# 1966 United States House of Representatives elections

The 1966 United States House of Representatives elections was an election for the United States House of Representatives on November 8, 1966, to elect members to serve in the 90th United States Congress. They occurred in the middle of President Lyndon B. Johnson's second term. As the Vietnam War continued to escalate and race riots exploded in cities across the country, Johnson's popularity had fallen, and the opposition Republican Party was able to gain a net of 47 seats from Johnson's Democratic Party, which nonetheless maintained a clear majority in the House. This was also the first election that occurred after the Voting Rights Act of 1965 became law, the first time since 1870 that a Republican won a House seat in Arkansas, and the first since 1876 that the party did so in South Carolina (after the same in a 1965 special election for the seat).

## Republican gains

* Alaska's at-large congressional district: four-term Democratic incumbent Ralph Rivers was defeated by Republican State Senator Howard Pollock.
* Arizona's 3rd congressional district: sophomore Democrat George F. Senner Jr. was defeated by state legislator Sam Steiger.
* Arkansas's 3rd congressional district: lumber executive and Arkansas GOP chair John Paul Hammerschmidt defeated incumbent James William Trimble, becoming the first Republican member of Arkansas' congressional delegation since Reconstruction.
* California's 18th congressional district: onetime Olympic gold medalist Bob Mathias defeated seven-term Democratic incumbent Harlan Hagen.
* California's 25th congressional district: Charles E. Wiggins defeated incumbent Democrat Ronald B. Cameron.
* California's 33rd congressional district: Jerry Pettis defeated incumbent Kenneth W. Dyal.
* Michigan’s 2nd congressional district: Marvin Esch defeated incumbent Democrat Weston E. Vivian.
* Michigan’s 3rd congressional district: Garry E. Brown defeated incumbent Democrat Paul H. Todd Jr..
* Michigan’s 7th congressional district: Donald Riegle defeated incumbent Democrat John C. Mackie.
* Michigan’s 11th congressional district: Phillip Ruppe defeated incumbent Democrat Raymond Clevenger.
* Michigan’s 19th congressional district: Jack H. McDonald defeated incumbent Democrat Billie S. Farnum.
* Texas's 7th congressional district: businessman and 1964 U.S. Senate candidate George H. W. Bush defeated Democratic challenger Frank Briscoe for the seat vacated by John Dowdy (whose district had been renumbered the second).
* Texas's 18th congressional district: Bob Price succeeded retiring Democrat Walter E. Rogers by defeating Dee Miller.

## Special elections

Elections are listed by date and district.
| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| North Carolina 1 | Herbert Covington Bonner | Democratic | 1940 | Incumbent died November 7, 1965. New member elected February 5, 1966. Democratic hold; winner was later re-elected. | ▌Y Walter B. Jones Sr. (Democratic) 60.3% ▌John Porter East (Republican) 39.7% |
| New York 17 | John Lindsay | Republican | 1958 | Incumbent resigned December 31, 1965 to become Mayor of New York City. New member elected February 8, 1966. Republican hold; winner was later re-elected. | ▌Y Theodore R. Kupferman (Republican) 46.4% ▌Orin Lehman (Democratic) 45.4% ▌Jeffrey St. John (Conservative) 8.2% |
| Texas 8 | Albert Thomas | Democratic | 1936 | Incumbent died February 15, 1966. New member elected March 26, 1966. Democratic hold; winner did not seek re-election. | ▌Y Lera Millard Thomas (Democratic) 74% ▌Louis Leman (Republican) 26% |
| California 14 | John F. Baldwin Jr. | Republican | 1954 | Incumbent died March 9, 1966. New member elected June 7, 1966. Democratic gain; winner was later re-elected. | ▌Y Jerome Waldie (Democratic) 51.2% ▌Frank Newman (Republican) 31.2% ▌John A. Richardson (Republican) 10.6% ▌Leo A. Costa (Democratic) 4.3% ▌Doris G. Johnston (Republican) 1.6% ▌Talluk B. Wrakstad (Republican) 1.2% |

## Overall results

411 incumbent members sought reelection, but 8 were defeated in primaries and 41 defeated in the general election for a total of 362 incumbents winning.
| 248 | 187 |
| Democrat | Republican |
| Parties | Parties | Seats | Seats | Seats | Seats | Popular Vote | Popular Vote | Popular Vote |
| Parties | Parties | 1964 | 1966 | Change | Strength | Vote | % | Change |
| | Democratic Party | 295 | 248 | 47 | 57.0% | 26,934,136 | 50.9% | 6.2% |
| | Republican Party | 140 | 187 | 47 | 43.0% | 25,521,157 | 48.2% | 5.8% |
| | Conservative Party | – | – | – | – | 208,756 | 0.4% | 0.3% |
| | Independent | – | – | – | – | 85,641 | 0.2% | |
| | Liberal Party | – | – | – | – | 75,303 | 0.1% | 0.1% |
| | Peace and Freedom Party | – | – | – | – | 16,922 | <0.1% | |
| | American Independent Party | – | – | – | – | 14,461 | <0.1% | |
| | Constitution Party | – | – | – | – | 11,110 | <0.1% | |
| | Socialist Labor Party | – | – | – | – | 5,771 | <0.1% | |
| | Independent-Socialist Party | – | – | – | – | 3,502 | <0.1% | |
| | New Hispano Party | – | – | – | – | 2,263 | <0.1% | |
| | People's Choice Party | – | – | – | – | 1,299 | <0.1% | |
| | Socialist Workers Party | – | – | – | – | 1,014 | <0.1% | |
| | Veteran Party | – | – | – | – | 939 | <0.1% | |
| | Others | – | – | – | – | 29,701 | 0.1% | 0.1% |
| Total | Total | 435 | 435 | 0 | 100.0% | 52,901,975 | 100.0% | —— |
Source: Election Statistics – Office of the Clerk
Popular vote
Democratic
50.91%
Republican
48.24%
Others
0.85% :
House seats
Democratic
57.01%
Republican
42.99% :
$^1$ One vacancy due to refusal of House to seat Adam Clayton Powell Jr. (D-New York)
| House seats by party holding plurality in state  80+% to 100% Democratic  80+% to 100% Republican  60+% to 80% Democratic  60+% to 80% Republican  ≤ 60% Democratic  ≤ 60% Republican | 6+ Democratic gain  6+ Republican gain  3-5 Democratic gain  3-5 Republican gain  1-2 Democratic gain  1-2 Republican gain  no net change |

## Alabama

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Alabama 1 | Jack Edwards | Republican | 1964 | Incumbent re-elected. | ▌Y Jack Edwards (Republican) 65.8% ▌Warren L. Finch (Democratic) 34.2% |
| Alabama 2 | William L. Dickinson | Republican | 1964 | Incumbent re-elected. | ▌Y William L. Dickinson (Republican) 54.6% ▌Robert F. Whaley (Democratic) 45.4% |
| Alabama 3 | George W. Andrews | Democratic | 1944 | Incumbent re-elected. | ▌Y George W. Andrews (Democratic) Unopposed |
| Alabama 4 | Glenn Andrews | Republican | 1964 | Incumbent lost re-election. Democratic gain. | ▌Y Bill Nichols (Democratic) 58.4% ▌Glenn Andrews (Republican) 41.6% |
| Alabama 5 | Armistead I. Selden Jr. | Democratic | 1952 | Incumbent re-elected. | ▌Y Armistead I. Selden Jr. (Democratic) Unopposed |
| Alabama 6 | John H. Buchanan Jr. | Republican | 1964 | Incumbent re-elected. | ▌Y John H. Buchanan Jr. (Republican) 63.4% ▌Walter Emmett Perry (Democratic) 36.6% |
| Alabama 7 | James D. Martin | Republican | 1964 | Incumbent retired to run for Governor of Alabama. Democratic gain. | ▌Y Tom Bevill (Democratic) 64.4% ▌Wayman Sherrer (Republican) 35.6% |
| Alabama 8 | Robert E. Jones Jr. | Democratic | 1947 (special) | Incumbent re-elected. | ▌Y Robert E. Jones Jr. (Democratic) 72.2% ▌Don Mayhall (Republican) 27.8% |

## Alaska

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Alaska at-large | Ralph Rivers | Democratic | 1958 | Incumbent lost re-election. Republican gain. | ▌Y Howard Pollock (Republican) 51.6% ▌Ralph Rivers (Democratic) 48.4% |

## Arizona

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Arizona 1 | John Jacob Rhodes | Republican | 1952 | Incumbent re-elected. | ▌Y John Jacob Rhodes (Republican) 67.1% ▌L. Alton Riggs (Democratic) 32.9% |
| Arizona 2 | Mo Udall | Democratic | 1961 (special) | Incumbent re-elected. | ▌Y Mo Udall (Democratic) 59.6% ▌G. Alfred McGinnis (Republican) 40.4% |
| Arizona 3 | George F. Senner Jr. | Democratic | 1962 | Incumbent lost re-election. Republican gain. | ▌Y Sam Steiger (Republican) 56.9% ▌George F. Senner Jr. (Democratic) 43.1% |

## Arkansas

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Arkansas 1 | Ezekiel C. Gathings | Democratic | 1938 | Incumbent re-elected. | ▌Y Ezekiel C. Gathings (Democratic) Unopposed |
| Arkansas 2 | Wilbur Mills | Democratic | 1938 | Incumbent re-elected. | ▌Y Wilbur Mills (Democratic) Unopposed |
| Arkansas 3 | James William Trimble | Democratic | 1944 | Incumbent lost re-election. Republican gain. | ▌Y John Paul Hammerschmidt (Republican) 53.1% ▌James William Trimble (Democratic) 46.9% |
| Arkansas 4 | Oren Harris | Democratic | 1940 | Incumbent resigned to become district judge. Democratic hold. | ▌Y David Pryor (Democratic) 65.0% ▌Lynn Lowe (Republican) 35.0% |

## California

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| California 1 | Don Clausen | Republican | 1963 (special) | Incumbent re-elected. | ▌Y Don Clausen (Republican) 65.1% ▌Thomas T. Storer (Democratic) 34.9% |
| California 2 | Bizz Johnson | Democratic | 1958 | Incumbent re-elected. | ▌Y Bizz Johnson (Democratic) 70.9% ▌William H. Romack Jr. (Republican) 29.1% |
| California 3 | John E. Moss | Democratic | 1952 | Incumbent re-elected. | ▌Y John E. Moss (Democratic) 67.5% ▌Terry G. Feil (Republican) 32.5% |
| California 4 | Robert Leggett | Democratic | 1962 | Incumbent re-elected. | ▌Y Robert Leggett (Democratic) 59.5% ▌Tom McHatton (Republican) 40.5% |
| California 5 | Phillip Burton | Democratic | 1964 | Incumbent re-elected. | ▌Y Phillip Burton (Democratic) 71.3% ▌Terry R. Macken (Republican) 28.7% |
| California 6 | William S. Mailliard | Republican | 1952 | Incumbent re-elected. | ▌Y William S. Mailliard (Republican) 76.6% ▌Le Rue Grim (Democratic) 23.4% |
| California 7 | Jeffery Cohelan | Democratic | 1958 | Incumbent re-elected. | ▌Y Jeffery Cohelan (Democratic) 64.4% ▌Malcolm M. Champlin (Republican) 35.6% |
| California 8 | George P. Miller | Democratic | 1944 | Incumbent re-elected. | ▌Y George P. Miller (Democratic) 65.4% ▌Raymond P. Britton (Republican) 34.6% |
| California 9 | Don Edwards | Democratic | 1962 | Incumbent re-elected. | ▌Y Don Edwards (Democratic) 63.2% ▌Wilbur G. Durkee (Republican) 36.8% |
| California 10 | Charles Gubser | Republican | 1952 | Incumbent re-elected. | ▌Y Charles Gubser (Republican) 69.1% ▌George Leppert (Democratic) 30.9% |
| California 11 | J. Arthur Younger | Republican | 1952 | Incumbent re-elected. | ▌Y J. Arthur Younger (Republican) 59.4% ▌W. Mark Sullivan (Democratic) 40.6% |
| California 12 | Burt Talcott | Republican | 1962 | Incumbent re-elected. | ▌Y Burt Talcott (Republican) 77.3% ▌Gerald V. Barron (Democratic) 22.7% |
| California 13 | Charles M. Teague | Republican | 1954 | Incumbent re-elected. | ▌Y Charles M. Teague (Republican) 67.5% ▌Charles A. Storke (Democratic) 32.5% |
| California 14 | Jerome Waldie | Democratic | 1966 | Incumbent re-elected. | ▌Y Jerome Waldie (Democratic) 56.4% ▌Frank Newman (Republican) 43.6% |
| California 15 | John J. McFall | Democratic | 1956 | Incumbent re-elected. | ▌Y John J. McFall (Democratic) 57.0% ▌Sam Van Dyken (Republican) 43.0% |
| California 16 | B. F. Sisk | Democratic | 1954 | Incumbent re-elected. | ▌Y B. F. Sisk (Democratic) 71.4% ▌Cecil F. White (Republican) 28.6% |
| California 17 | Cecil R. King | Democratic | 1942 | Incumbent re-elected. | ▌Y Cecil R. King (Democratic) 60.8% ▌Don Cortum (Republican) 39.2% |
| California 18 | Harlan Hagen | Democratic | 1952 | Incumbent lost re-election. Republican gain. | ▌Y Bob Mathias (Republican) 55.9% ▌Harlan Hagen (Democratic) 44.1% |
| California 19 | Chet Holifield | Democratic | 1942 | Incumbent re-elected. | ▌Y Chet Holifield (Democratic) 62.3% ▌William R. Sutton (Republican) 37.7% |
| California 20 | H. Allen Smith | Republican | 1956 | Incumbent re-elected. | ▌Y H. Allen Smith (Republican) 73.4% ▌Raymond Freschi (Democratic) 26.6% |
| California 21 | Augustus Hawkins | Democratic | 1962 | Incumbent re-elected. | ▌Y Augustus Hawkins (Democratic) 84.8% ▌Rayfield Lundy (Republican) 15.2% |
| California 22 | James C. Corman | Democratic | 1960 | Incumbent re-elected. | ▌Y James C. Corman (Democratic) 53.5% ▌Bob Cline (Republican) 46.5% |
| California 23 | Del M. Clawson | Republican | 1963 (special) | Incumbent re-elected. | ▌Y Del M. Clawson (Republican) 67.4% ▌Ed O'Connor (Democratic) 32.6% |
| California 24 | Glenard P. Lipscomb | Republican | 1953 (special) | Incumbent re-elected. | ▌Y Glenard P. Lipscomb (Republican) 76.3% ▌Earl G. McNall (Democratic) 23.7% |
| California 25 | Ronald B. Cameron | Democratic | 1962 | Incumbent lost re-election. Republican gain. | ▌Y Charles E. Wiggins (Republican) 52.6% ▌Ronald B. Cameron (Democratic) 47.4% |
| California 26 | Thomas M. Rees | Democratic | 1965 (special) | Incumbent re-elected. | ▌Y Thomas M. Rees (Democratic) 62.3% ▌Irving Teichner (Republican) 37.7% |
| California 27 | Edwin Reinecke | Republican | 1964 | Incumbent re-elected. | ▌Y Edwin Reinecke (Republican) 65.3% ▌John A. "Jack" Howard (Democratic) 34.7% |
| California 28 | Alphonzo E. Bell Jr. | Republican | 1960 | Incumbent re-elected. | ▌Y Alphonzo E. Bell Jr. (Republican) 72.3% ▌Lawrence "Lorry" Sherman (Democratic) 27.7% |
| California 29 | George Brown Jr. | Democratic | 1962 | Incumbent re-elected. | ▌Y George Brown Jr. (Democratic) 51.1% ▌Bill Orozco (Republican) 48.9% |
| California 30 | Edward R. Roybal | Democratic | 1962 | Incumbent re-elected. | ▌Y Edward R. Roybal (Democratic) 66.4% ▌Henri O'Bryant Jr. (Republican) 33.6% |
| California 31 | Charles H. Wilson | Democratic | 1962 | Incumbent re-elected. | ▌Y Charles H. Wilson (Democratic) 63.4% ▌Theodore Smith (Republican) 36.6% |
| California 32 | Craig Hosmer | Republican | 1952 | Incumbent re-elected. | ▌Y Craig Hosmer (Republican) 80.1% ▌Tracy Odell (Democratic) 19.9% |
| California 33 | Kenneth W. Dyal | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Jerry Pettis (Republican) 53.5% ▌Kenneth W. Dyal (Democratic) 46.5% |
| California 34 | Richard T. Hanna | Democratic | 1962 | Incumbent re-elected. | ▌Y Richard T. Hanna (Democratic) 55.8% ▌Frank LaMagna (Republican) 44.2% |
| California 35 | James B. Utt | Republican | 1952 | Incumbent re-elected. | ▌Y James B. Utt (Republican) 73.1% ▌Thomas B. Lenhart (Democratic) 26.9% |
| California 36 | Bob Wilson | Republican | 1952 | Incumbent re-elected. | ▌Y Bob Wilson (Republican) 72.9% ▌William C. Godfrey (Democratic) 27.1% |
| California 37 | Lionel Van Deerlin | Democratic | 1962 | Incumbent re-elected. | ▌Y Lionel Van Deerlin (Democratic) 61.2% ▌Samuel S. Vener (Republican) 38.8% |
| California 38 | John V. Tunney | Democratic | 1964 | Incumbent re-elected. | ▌Y John V. Tunney (Democratic) 54.5% ▌Robert R. Barry (Republican) 45.5% |

## Colorado

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Colorado 1 | Byron G. Rogers | Democratic | 1950 | Incumbent re-elected. | ▌Y Byron G. Rogers (Democratic) 56.0% ▌Greg Pearson (Republican) 44.0% |
| Colorado 2 | Roy H. McVicker | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Donald G. Brotzman (Republican) 51.7% ▌Roy H. McVicker (Democratic) 47.1% ▌Joe Lucero (New Hispano) 1.2% |
| Colorado 3 | Frank Evans | Democratic | 1964 | Incumbent re-elected. | ▌Y Frank Evans (Democratic) 51.7% ▌David W. Enoch (Republican) 48.3% |
| Colorado 4 | Wayne N. Aspinall | Democratic | 1948 | Incumbent re-elected. | ▌Y Wayne N. Aspinall (Democratic) 58.6% ▌James Paul Johnson (Republican) 41.4% |

## Connecticut

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Connecticut 1 | Emilio Q. Daddario | Democratic | 1958 | Incumbent re-elected. | ▌Y Emilio Q. Daddario (Democratic) 58.0% ▌John L. Bonee (Republican) 41.2% ▌Donald B. LaCroix (People's Choice) 0.8% |
| Connecticut 2 | William St. Onge | Democratic | 1962 | Incumbent re-elected. | ▌Y William St. Onge (Democratic) 56.2% ▌Joseph H. Goldberg (Republican) 43.2% ▌Daniel R. Tarasevich (Veteran) 0.6% |
| Connecticut 3 | Robert Giaimo | Democratic | 1958 | Incumbent re-elected. | ▌Y Robert Giaimo (Democratic) 53.1% ▌Stelio Salmona (Republican) 41.5% ▌Robert M. Cook (American Independent) 5.4% |
| Connecticut 4 | Donald J. Irwin | Democratic | 1958 1960 (lost) 1964 | Incumbent re-elected. | ▌Y Donald J. Irwin (Democratic) 51.0% ▌Abner W. Sibal (Republican) 49.0% |
| Connecticut 5 | John S. Monagan | Democratic | 1958 | Incumbent re-elected. | ▌Y John S. Monagan (Democratic) 59.1% ▌Romeo G. Petroni (Republican) 40.9% |
| Connecticut 6 | Bernard F. Grabowski | Democratic | 1962 | Incumbent lost re-election. Republican gain. | ▌Y Thomas Meskill (Republican) 48.9% ▌Bernard F. Grabowski (Democratic) 47.7% ▌Stephen Minot (American Independent) 3.4% |

## Delaware

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Delaware at-large | Harris McDowell | Democratic | 1958 | Incumbent lost re-election. Republican gain. | ▌Y William Roth (Republican) 55.8% ▌Harris McDowell (Democratic) 44.2% |

## Florida

Florida redistricted to adjust for demographic changes; in addition to minor boundary changes a district was removed from northern Florida, and Broward County was broken out into its own district.
| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Florida 1 | Bob Sikes | Democratic | 1940 1944 (resigned) 1974 | Incumbent re-elected. | ▌Y Bob Sikes (Democratic) Unopposed |
| Florida 2 | Don Fuqua Redistricted from the 9th district | Democratic | 1962 | Incumbent re-elected. | ▌Y Don Fuqua (Democratic) 76.3% ▌Harold Hill (Republican) 23.7% |
| Florida 2 | D. R. Matthews Redistricted from the 8th district | Democratic | 1952 | Incumbent lost renomination. Democratic loss. | ▌Y Don Fuqua (Democratic) 76.3% ▌Harold Hill (Republican) 23.7% |
| Florida 3 | Charles E. Bennett Redistricted from the 2nd district | Democratic | 1948 | Incumbent re-elected. | ▌Y Charles E. Bennett (Democratic) Unopposed |
| Florida 4 | Syd Herlong Redistricted from the 5th district | Democratic | 1948 | Incumbent re-elected. | ▌Y Syd Herlong (Democratic) Unopposed |
| Florida 5 | Edward Gurney Redistricted from the 11th district | Republican | 1962 | Incumbent re-elected. | ▌Y Edward Gurney (Republican) Unopposed |
| Florida 6 | Sam Gibbons Redistricted from the 10th district | Democratic | 1962 | Incumbent re-elected. | ▌Y Sam Gibbons (Democratic) Unopposed |
| Florida 7 | James A. Haley | Democratic | 1952 | Incumbent re-elected. | ▌Y James A. Haley (Democratic) 63.2% ▌Joe Z. Lovingood (Republican) 36.8% |
| Florida 8 | William C. Cramer Redistricted from the 12th district | Republican | 1954 | Incumbent re-elected. | ▌Y William C. Cramer (Republican) 70.8% ▌Roy L. Reynolds (Democratic) 29.2% |
| Florida 9 | Paul Rogers Redistricted from the 6th district | Democratic | 1954 | Incumbent re-elected. | ▌Y Paul Rogers (Democratic) Unopposed |
| Florida 10 | None (district created) | None (district created) | None (district created) | New seat. Republican gain. | ▌Y J. Herbert Burke (Republican) 61.1% ▌Joe Varon (Democratic) 38.9% |
| Florida 11 | Claude Pepper Redistricted from the 3rd district | Democratic | 1962 | Incumbent re-elected. | ▌Y Claude Pepper (Democratic) Unopposed |
| Florida 12 | Dante Fascell Redistricted from the 4th district | Democratic | 1954 | Incumbent re-elected. | ▌Y Dante Fascell (Democratic) 56.9% ▌Mike Thompson (Republican) 43.1% |

## Georgia

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Georgia 1 | G. Elliott Hagan | Democratic | 1960 | Incumbent re-elected. | ▌Y G. Elliott Hagan (Democratic) 58.0% ▌Porter Carswell (Republican) 42.0% |
| Georgia 2 | Maston E. O'Neal Jr. | Democratic | 1964 | Incumbent re-elected. | ▌Y Maston E. O'Neal Jr. (Democratic) Unopposed |
| Georgia 3 | Bo Callaway | Republican | 1964 | Incumbent retired to run for governor. Democratic gain. | ▌Y Jack Brinkley (Democratic) 61.8% ▌Billy J. Mixon (Republican) 38.2% |
| Georgia 4 | James MacKay | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Benjamin B. Blackburn (Republican) 50.2% ▌James MacKay (Democratic) 49.8% |
| Georgia 5 | Charles L. Weltner | Democratic | 1962 | Incumbent withdrew and was replaced on the ballot. Republican gain. | ▌Y Fletcher Thompson (Republican) 60.1% ▌Archie L. Lindsey (Democratic) 39.9% |
| Georgia 6 | John Flynt | Democratic | 1954 | Incumbent re-elected. | ▌Y John Flynt (Democratic) 67.9% ▌G. Paul Jones Jr. (Republican) 32.1% |
| Georgia 7 | John William Davis | Democratic | 1960 | Incumbent re-elected. | ▌Y John William Davis (Democratic) 65.0% ▌Edward Y. Chapin (Republican) 35.0% |
| Georgia 8 | J. Russell Tuten | Democratic | 1962 | Incumbent lost renomination. Democratic hold. | ▌Y W. S. Stuckey Jr. (Democratic) 77.0% ▌Mack Mattingly (Republican) 23.0% |
| Georgia 9 | Phillip M. Landrum | Democratic | 1952 | Incumbent re-elected. | ▌Y Phillip M. Landrum (Democratic) Unopposed |
| Georgia 10 | Robert Grier Stephens Jr. | Democratic | 1960 | Incumbent re-elected. | ▌Y Robert Grier Stephens Jr. (Democratic) 65.5% ▌Leroy H. Simkins (Republican) 34.5% |

## Hawaii

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Hawaii at-large | Spark Matsunaga | Democratic | 1962 | Incumbent re-elected. | Elected on a general ticket: ▌Y Patsy Mink (Democratic) 34.3% ▌Y Spark Matsunaga (Democratic) 34.1% ▌John Carroll (Republican) 16.4% ▌James Kealoha (Republican) 15.2% |
| Hawaii at-large | Patsy Mink | Democratic | 1964 | Incumbent re-elected. | Elected on a general ticket: ▌Y Patsy Mink (Democratic) 34.3% ▌Y Spark Matsunaga (Democratic) 34.1% ▌John Carroll (Republican) 16.4% ▌James Kealoha (Republican) 15.2% |

## Idaho

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Idaho 1 | Compton I. White Jr. | Democratic | 1962 | Incumbent lost re-election. Republican gain. | ▌Y Jim McClure (Republican) 51.8% ▌Compton I. White Jr. (Democratic) 48.2% |
| Idaho 2 | George V. Hansen | Republican | 1964 | Incumbent re-elected. | ▌Y George V. Hansen (Republican) 70.3% ▌A. W. Brunt (Democratic) 29.7% |

## Illinois

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Illinois 1 | William L. Dawson | Democratic | 1942 | Incumbent re-elected. | ▌Y William L. Dawson (Democratic) 72.6% ▌David R. Reed (Republican) 27.4% |
| Illinois 2 | Barratt O'Hara | Democratic | 1948 1950 (lost) 1952 | Incumbent re-elected. | ▌Y Barratt O'Hara (Democratic) 59.2% ▌Philip G. Bixler (Republican) 40.8% |
| Illinois 3 | William T. Murphy | Democratic | 1958 | Incumbent re-elected. | ▌Y William T. Murphy (Democratic) 52.0% ▌Alfred F. Manion (Republican) 48.0% |
| Illinois 4 | Ed Derwinski | Republican | 1958 | Incumbent re-elected. | ▌Y Ed Derwinski (Republican) 72.0% ▌Ray J. Rybacki (Democratic) 28.0% |
| Illinois 5 | John C. Kluczynski | Democratic | 1950 | Incumbent re-elected. | ▌Y John C. Kluczynski (Democratic) 56.2% ▌Walter K. Kiltz (Republican) 43.8% |
| Illinois 6 | Daniel J. Ronan | Democratic | 1964 | Incumbent re-elected. | ▌Y Daniel J. Ronan (Democratic) 57.0% ▌Samuel A. DeCaro (Republican) 43.0% |
| Illinois 7 | Frank Annunzio | Democratic | 1964 | Incumbent re-elected. | ▌Y Frank Annunzio (Democratic) 80.9% ▌Joseph D. Day (Republican) 19.1% |
| Illinois 8 | Dan Rostenkowski | Democratic | 1958 | Incumbent re-elected. | ▌Y Dan Rostenkowski (Democratic) 59.9% ▌John H. Leszynski (Republican) 40.1% |
| Illinois 9 | Sidney R. Yates | Democratic | 1948 1962 (retired) 1964 | Incumbent re-elected. | ▌Y Sidney R. Yates (Democratic) 59.9% ▌Richard C. Storey Jr. (Republican) 40.1% |
| Illinois 10 | Harold R. Collier | Republican | 1956 | Incumbent re-elected. | ▌Y Harold R. Collier (Republican) 69.4% ▌Frank J. Jirka Jr. (Democratic) 30.6% |
| Illinois 11 | Roman Pucinski | Democratic | 1958 | Incumbent re-elected. | ▌Y Roman Pucinski (Democratic) 50.9% ▌John J. Hoellen Jr. (Republican) 49.1% |
| Illinois 12 | Robert McClory | Republican | 1962 | Incumbent re-elected. | ▌Y Robert McClory (Republican) 69.1% ▌Herbert L. Stern (Democratic) 30.9% |
| Illinois 13 | Donald Rumsfeld | Republican | 1962 | Incumbent re-elected. | ▌Y Donald Rumsfeld (Republican) 76.0% ▌James L. McCabe (Democratic) 24.0% |
| Illinois 14 | John N. Erlenborn | Republican | 1964 | Incumbent re-elected. | ▌Y John N. Erlenborn (Republican) 71.7% ▌Kenneth McCleary (Democratic) 28.3% |
| Illinois 15 | Charlotte Thompson Reid | Republican | 1962 | Incumbent re-elected. | ▌Y Charlotte Thompson Reid (Republican) 72.3% ▌Selwyn L. Boyer (Democratic) 27.7% |
| Illinois 16 | John B. Anderson | Republican | 1960 | Incumbent re-elected. | ▌Y John B. Anderson (Republican) 73.0% ▌Robert M. Whiteford (Democratic) 27.0% |
| Illinois 17 | Leslie C. Arends | Republican | 1934 | Incumbent re-elected. | ▌Y Leslie C. Arends (Republican) 67.4% ▌Bernard J. Hughes (Democratic) 32.6% |
| Illinois 18 | Robert H. Michel | Republican | 1956 | Incumbent re-elected. | ▌Y Robert H. Michel (Republican) 58.4% ▌Thomas V. Cassidy (Democratic) 41.6% |
| Illinois 19 | Gale Schisler | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Tom Railsback (Republican) 52.3% ▌Gale Schisler (Democratic) 47.7% |
| Illinois 20 | Paul Findley | Republican | 1960 | Incumbent re-elected. | ▌Y Paul Findley (Republican) 62.2% ▌Richard R. Wolfe (Democratic) 37.8% |
| Illinois 21 | Kenneth J. Gray | Democratic | 1954 | Incumbent re-elected. | ▌Y Kenneth J. Gray (Democratic) 56.2% ▌G. R. Beckmeyer (Republican) 43.8% |
| Illinois 22 | William L. Springer | Republican | 1950 | Incumbent re-elected. | ▌Y William L. Springer (Republican) 63.3% ▌Cameron B. Satterthwaite (Democratic) 36.7% |
| Illinois 23 | George E. Shipley | Democratic | 1958 | Incumbent re-elected. | ▌Y George E. Shipley (Democratic) 56.4% ▌Leslie N. Jones (Republican) 43.6% |
| Illinois 24 | Melvin Price | Democratic | 1944 | Incumbent re-elected. | ▌Y Melvin Price (Democratic) 71.5% ▌John S. Guthrie (Republican) 28.5% |

## Indiana

Indiana redistricted for this election, election boundary changes forced two Republican incumbents into the same district while creating a new district that was won by another Republican.
| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Indiana 1 | Ray Madden | Democratic | 1942 | Incumbent re-elected. | ▌Y Ray Madden (Democratic) 58.3% ▌Albert Harrigan (Republican) 41.7% |
| Indiana 2 | Charles A. Halleck | Republican | 1935 (special) | Incumbent re-elected. | ▌Y Charles A. Halleck (Republican) 57.5% ▌Ralph G. McFadden (Democratic) 42.5% |
| Indiana 3 | John Brademas | Democratic | 1958 | Incumbent re-elected. | ▌Y John Brademas (Democratic) 55.8% ▌Robert A. Ehlers (Republican) 44.2% |
| Indiana 4 | E. Ross Adair | Republican | 1950 | Incumbent re-elected. | ▌Y E. Ross Adair (Republican) 63.5% ▌J. Byron Hayes (Democratic) 36.5% |
| Indiana 5 | J. Edward Roush | Democratic | 1958 | Incumbent re-elected. | ▌Y J. Edward Roush (Democratic) 51.1% ▌Kenneth Bowman (Republican) 48.9% |
| Indiana 6 | William G. Bray Redistricted from the 7th district | Republican | 1950 | Incumbent re-elected. | ▌Y William G. Bray (Republican) 65.7% ▌James M. Nicholson (Democratic) 33.6% ▌Henry W. Holt (Independent) 0.7% |
| Indiana 7 | None (district created) | None (district created) | None (district created) | New seat. Republican gain. | ▌Y John T. Myers (Republican) 54.3% ▌Elden C. Tipton (Democratic) 45.7% |
| Indiana 8 | Winfield K. Denton | Democratic | 1954 | Incumbent lost re-election. Republican gain. | ▌Y Roger H. Zion (Republican) 51.1% ▌Winfield K. Denton (Democratic) 48.9% |
| Indiana 9 | Lee Hamilton | Democratic | 1964 | Incumbent re-elected. | ▌Y Lee Hamilton (Democratic) 53.8% ▌John W. Lewis (Republican) 46.2% |
| Indiana 10 | Richard L. Roudebush Redistricted from the 6th district | Republican | 1960 | Incumbent re-elected. | ▌Y Richard L. Roudebush (Republican) 63.4% ▌Robert H. Staton (Democratic) 36.6% |
| Indiana 10 | Ralph Harvey | Republican | 1960 | Incumbent lost renomination. Republican loss. | ▌Y Richard L. Roudebush (Republican) 63.4% ▌Robert H. Staton (Democratic) 36.6% |
| Indiana 11 | Andrew Jacobs Jr. | Democratic | 1964 | Incumbent re-elected. | ▌Y Andrew Jacobs Jr. (Democratic) 55.7% ▌Paul R. Oakes (Republican) 44.3% |

## Iowa

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Iowa 1 | John R. Schmidhauser | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Fred Schwengel (Republican) 51.3% ▌John R. Schmidhauser (Democratic) 47.9% ▌Merle M. Thayer (American Constitution) 0.8% |
| Iowa 2 | John Culver | Democratic | 1964 | Incumbent re-elected. | ▌Y John Culver (Democratic) 54.0% ▌Robert M. L. Johnson (Republican) 46.0% |
| Iowa 3 | H. R. Gross | Republican | 1948 | Incumbent re-elected. | ▌Y H. R. Gross (Republican) 62.0% ▌L. A. Pat Touchae (Democratic) 38.0% |
| Iowa 4 | Bert Bandstra | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y John Henry Kyl (Republican) 51.7% ▌Bert Bandstra (Democratic) 48.3% |
| Iowa 5 | Neal Smith | Democratic | 1958 | Incumbent re-elected. | ▌Y Neal Smith (Democratic) 60.4% ▌Don Mahon (Republican) 39.0% ▌Robbins Risher (American Constitution) 0.6% |
| Iowa 6 | Stanley L. Greigg | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Wiley Mayne (Republican) 57.4% ▌Stanley L. Greigg (Democratic) 42.3% ▌Lee E. Smith (American Constitution) 0.3% |
| Iowa 7 | John R. Hansen | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y William J. Scherle (Republican) 59.0% ▌John R. Hansen (Democratic) 40.9% ▌Gordon Risher (American Constitution) 0.1% |

## Kansas

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Kansas 1 | Bob Dole | Republican | 1960 | Incumbent re-elected. | ▌Y Bob Dole (Republican) 68.6% ▌Berniece Henkle (Democratic) 31.4% |
| Kansas 2 | Chester L. Mize | Republican | 1964 | Incumbent re-elected. | ▌Y Chester L. Mize (Republican) 62.8% ▌Harry G. Wiles (Democratic) 37.2% |
| Kansas 3 | Robert Ellsworth | Republican | 1960 | Incumbent retired to run for U.S. senator. Republican hold. | ▌Y Larry Winn (Republican) 52.9% ▌Marvin E. Rainey (Democratic) 45.0% ▌Harold H. Shomber (Conservative) 2.1% |
| Kansas 4 | Garner E. Shriver | Republican | 1960 | Incumbent re-elected. | ▌Y Garner E. Shriver (Republican) 68.7% ▌Paul H. Gerling (Democratic) 31.3% |
| Kansas 5 | Joe Skubitz | Republican | 1962 | Incumbent re-elected. | ▌Y Joe Skubitz (Republican) 60.9% ▌Delno L. Bass (Democratic) 39.1% |

## Kentucky

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Kentucky 1 | Frank Stubblefield | Democratic | 1958 | Incumbent re-elected. | ▌Y Frank Stubblefield (Democratic) 70.6% ▌Richard Nicholson (Republican) 29.4% |
| Kentucky 2 | William Natcher | Democratic | 1953 (special) | Incumbent re-elected. | ▌Y William Natcher (Democratic) 58.9% ▌R. Douglas Ford (Republican) 41.1% |
| Kentucky 3 | Charles R. Farnsley | Democratic | 1964 | Incumbent retired. Republican gain. | ▌Y William Cowger (Republican) 59.0% ▌Norbert Blume (Democratic) 41.0% |
| Kentucky 4 | Frank Chelf | Democratic | 1944 | Incumbent retired, but replaced John Moloney on the ballot after he died 2 days before the election. Incumbent lost re-election. Republican gain. | ▌Y Gene Snyder (Republican) 53.9% ▌Frank Chelf (Democratic) 45.9% ▌John J. Moloney (write-in) 0.1% |
| Kentucky 5 | Tim Lee Carter | Republican | 1964 | Incumbent re-elected. | ▌Y Tim Lee Carter (Republican) 75.4% ▌Eugene C. Harter Jr. (Democratic) 24.6% |
| Kentucky 6 | John C. Watts | Democratic | 1951 (special) | Incumbent re-elected. | ▌Y John C. Watts (Democratic) 65.0% ▌William Hendren (Republican) 35.0% |
| Kentucky 7 | Carl D. Perkins | Democratic | 1948 | Incumbent re-elected. | ▌Y Carl D. Perkins (Democratic) 68.9% ▌C. F. See (Republican) 31.1% |

## Louisiana

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Louisiana 1 | F. Edward Hébert | Democratic | 1940 | Incumbent re-elected. | ▌Y F. Edward Hébert (Democratic) Unopposed |
| Louisiana 2 | Hale Boggs | Democratic | 1940 1942 (lost) 1946 | Incumbent re-elected. | ▌Y Hale Boggs (Democratic) 68.6% ▌Leonard L. Limes (Republican) 31.4% |
| Louisiana 3 | Edwin E. Willis | Democratic | 1948 | Incumbent re-elected. | ▌Y Edwin E. Willis (Democratic) 59.7% ▌Hall Lyons (Republican) 40.3% |
| Louisiana 4 | Joe Waggonner | Democratic | 1961 (special) | Incumbent re-elected. | ▌Y Joe Waggonner (Democratic) Unopposed |
| Louisiana 5 | Otto Passman | Democratic | 1946 | Incumbent re-elected. | ▌Y Otto Passman (Democratic) Unopposed |
| Louisiana 6 | James H. Morrison | Democratic | 1942 | Incumbent lost renomination. Democratic hold. | ▌Y John Rarick (Democratic) 76.6% ▌Crayton G. Hall (Republican) 23.4% |
| Louisiana 7 | Edwin Edwards | Democratic | 1965 (special) | Incumbent re-elected. | ▌Y Edwin Edwards (Democratic) Unopposed |
| Louisiana 8 | Speedy Long | Democratic | 1964 | Incumbent re-elected. | ▌Y Speedy Long (Democratic) Unopposed |

## Maine

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Maine 1 | Stanley R. Tupper | Republican | 1960 | Incumbent retired. Democratic gain. | ▌Y Peter Kyros (Democratic) 50.4% ▌Peter A. Garland (Republican) 45.2% ▌Thomas L. Maynard (Independent) 4.4% |
| Maine 2 | William Hathaway | Democratic | 1964 | Incumbent re-elected. | ▌Y William Hathaway (Democratic) 56.8% ▌Howard M. Foley (Republican) 43.2% |

## Maryland

Maryland redistricted its at-large district into an 8th district around Montgomery County, managing to adjust boundaries so no existing incumbents were displaced.
| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Maryland 1 | Rogers Morton | Republican | 1962 | Incumbent re-elected. | ▌Y Rogers Morton (Republican) 71.4% ▌Harry C. Byrd (Democratic) 28.6% |
| Maryland 2 | Clarence Long | Democratic | 1962 | Incumbent re-elected. | ▌Y Clarence Long (Democratic) 69.3% ▌Paul T. McHenry Jr. (Republican) 30.7% |
| Maryland 3 | Edward Garmatz | Democratic | 1947 (special) | Incumbent re-elected. | ▌Y Edward Garmatz (Democratic) Unopposed |
| Maryland 4 | George Hyde Fallon | Democratic | 1944 | Incumbent re-elected. | ▌Y George Hyde Fallon (Democratic) 74.3% ▌G. Neilson Sigler (Republican) 25.7% |
| Maryland 5 | Hervey Machen | Democratic | 1964 | Incumbent re-elected. | ▌Y Hervey Machen (Democratic) 53.9% ▌Lawrence Hogan (Republican) 46.1% |
| Maryland 6 | Charles Mathias | Republican | 1960 | Incumbent re-elected. | ▌Y Charles Mathias (Republican) 70.9% ▌Walter G. Finch (Democratic) 29.1% |
| Maryland 7 | Samuel Friedel | Democratic | 1952 | Incumbent re-elected. | ▌Y Samuel Friedel (Democratic) 76.0% ▌Stephen L. Rosenstein (Republican) 24.0% |
| Maryland 8 | Carlton R. Sickles Redistricted from the at-large seat | Democratic | 1962 | Incumbent retired to run for governor. Republican gain. | ▌Y Gilbert Gude (Republican) 54.4% ▌Royce Hanson (Democratic) 45.6% |

## Massachusetts

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Massachusetts 1 | Silvio O. Conte | Republican | 1958 | Incumbent re-elected. | ▌Y Silvio O. Conte (Republican) Unopposed |
| Massachusetts 2 | Edward Boland | Democratic | 1952 | Incumbent re-elected. | ▌Y Edward Boland (Democratic) Unopposed |
| Massachusetts 3 | Philip J. Philbin | Democratic | 1942 | Incumbent re-elected. | ▌Y Philip J. Philbin (Democratic) 71.0% ▌Howard A. Miller Jr. (Republican) 29.0% |
| Massachusetts 4 | Harold Donohue | Democratic | 1946 | Incumbent re-elected. | ▌Y Harold Donohue (Democratic) Unopposed |
| Massachusetts 5 | F. Bradford Morse | Republican | 1960 | Incumbent re-elected. | ▌Y F. Bradford Morse (Republican) 74.8% ▌Charles N. Tsapatsaris (Democratic) 25.2% |
| Massachusetts 6 | William H. Bates | Republican | 1950 | Incumbent re-elected. | ▌Y William H. Bates (Republican) 65.7% ▌Daniel L. Parent (Democratic) 34.3% |
| Massachusetts 7 | Torbert Macdonald | Democratic | 1954 | Incumbent re-elected. | ▌Y Torbert Macdonald (Democratic) 74.5% ▌Gordon F. Hughes (Republican) 25.5% |
| Massachusetts 8 | Tip O'Neill | Democratic | 1952 | Incumbent re-elected. | ▌Y Tip O'Neill (Democratic) Unopposed |
| Massachusetts 9 | John W. McCormack | Democratic | 1928 | Incumbent re-elected. | ▌Y John W. McCormack (Democratic) Unopposed |
| Massachusetts 10 | Joseph W. Martin Jr. | Republican | 1924 | Incumbent lost renomination. Republican hold. | ▌Y Margaret Heckler (Republican) 51.1% ▌Patrick H. Harrington Jr. (Democratic) 48.9% |
| Massachusetts 11 | James A. Burke | Democratic | 1958 | Incumbent re-elected. | ▌Y James A. Burke (Democratic) 74.8% ▌James L. Hofford (Republican) 25.2% |
| Massachusetts 12 | Hastings Keith | Republican | 1958 | Incumbent re-elected. | ▌Y Hastings Keith (Republican) 55.0% ▌Edward F. Harrington (Democratic) 45.0% |

## Michigan

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Michigan 1 | John Conyers | Democratic | 1964 | Incumbent re-elected. | ▌Y John Conyers (Democratic) 84.2% ▌Rhecha R. Ross (Republican) 15.8% |
| Michigan 2 | Weston E. Vivian | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Marvin L. Esch (Republican) 51.0% ▌Weston E. Vivian (Democratic) 49.0% |
| Michigan 3 | Paul H. Todd Jr. | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Garry E. Brown (Republican) 52.2% ▌Paul H. Todd Jr. (Democratic) 47.8% |
| Michigan 4 | J. Edward Hutchinson | Republican | 1962 | Incumbent re-elected. | ▌Y J. Edward Hutchinson (Republican) 67.8% ▌John V. Martin (Democratic) 32.2% |
| Michigan 5 | Gerald Ford | Republican | 1948 | Incumbent re-elected. | ▌Y Gerald Ford (Republican) 68.4% ▌James Mathew Catchick (Democratic) 31.6% |
| Michigan 6 | Charles E. Chamberlain | Republican | 1956 | Incumbent re-elected. | ▌Y Charles E. Chamberlain (Republican) 67.3% ▌Lee H. Wenke (Democratic) 32.7% |
| Michigan 7 | John C. Mackie | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Donald Riegle (Republican) 54.1% ▌John C. Mackie (Democratic) 45.9% |
| Michigan 8 | R. James Harvey | Republican | 1960 | Incumbent re-elected. | ▌Y R. James Harvey (Republican) 69.9% ▌Wager F. Clunis (Democratic) 30.1% |
| Michigan 9 | Robert P. Griffin | Republican | 1956 | Resigned to become U.S. senator. Republican hold. | ▌Y Guy Vander Jagt (Republican) 66.7% ▌Henry J. Dongvillo (Democratic) 33.3% |
| Michigan 10 | Al Cederberg | Republican | 1952 | Incumbent re-elected. | ▌Y Al Cederberg (Republican) 67.4% ▌Hubert C. Evans (Democratic) 32.6% |
| Michigan 11 | Raymond F. Clevenger | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Philip Ruppe (Republican) 51.8% ▌Raymond F. Clevenger (Democratic) 48.2% |
| Michigan 12 | James G. O'Hara | Democratic | 1958 | Incumbent re-elected. | ▌Y James G. O'Hara (Democratic) 65.1% ▌Patrick J. Driscoll (Republican) 34.9% |
| Michigan 13 | Charles Diggs | Democratic | 1954 | Incumbent re-elected. | ▌Y Charles Diggs (Democratic) 83.0% ▌Frank Daniels (Republican) 17.0% |
| Michigan 14 | Lucien Nedzi | Democratic | 1961 (special) | Incumbent re-elected. | ▌Y Lucien Nedzi (Democratic) 59.7% ▌William J. Kennedy (Republican) 40.3% |
| Michigan 15 | William D. Ford | Democratic | 1964 | Incumbent re-elected. | ▌Y William D. Ford (Democratic) 67.8% ▌Arpo Yemen (Republican) 32.2% |
| Michigan 16 | John Dingell | Democratic | 1955 (special) | Incumbent re-elected. | ▌Y John Dingell (Democratic) 62.7% ▌John T. Dempsey (Republican) 37.3% |
| Michigan 17 | Martha Griffiths | Democratic | 1954 | Incumbent re-elected. | ▌Y Martha Griffiths (Democratic) 69.2% ▌William P. Harrington (Republican) 30.8% |
| Michigan 18 | William Broomfield | Republican | 1956 | Incumbent re-elected. | ▌Y William Broomfield (Republican) 67.8% ▌William H. Merrill (Democratic) 32.2% |
| Michigan 19 | Billie S. Farnum | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Jack H. McDonald (Republican) 57.0% ▌Billie S. Farnum (Democratic) 43.0% |

## Minnesota

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Minnesota 1 | Al Quie | Republican | 1958 | Incumbent re-elected. | ▌Y Al Quie (Republican) 65.9% ▌George Daley (DFL) 34.1% |
| Minnesota 2 | Ancher Nelsen | Republican | 1958 | Incumbent re-elected. | ▌Y Ancher Nelsen (Republican) 66.2% ▌Charles M. Christensen (DFL) 33.8% |
| Minnesota 3 | Clark MacGregor | Republican | 1960 | Incumbent re-elected. | ▌Y Clark MacGregor (Republican) 65.4% ▌Elva D. Walker (DFL) 34.6% |
| Minnesota 4 | Joseph Karth | DFL | 1958 | Incumbent re-elected. | ▌Y Joseph Karth (DFL) 53.4% ▌Stephen Maxwell (Republican) 46.6% |
| Minnesota 5 | Donald M. Fraser | DFL | 1962 | Incumbent re-elected. | ▌Y Donald M. Fraser (DFL) 59.7% ▌William L. Hathaway (Republican) 40.3% |
| Minnesota 6 | Alec G. Olson | DFL | 1962 | Incumbent lost re-election. Republican gain. | ▌Y John M. Zwach (Republican) 51.4% ▌Alec G. Olson (DFL) 48.6% |
| Minnesota 7 | Odin Langen | Republican | 1958 | Incumbent re-elected. | ▌Y Odin Langen (Republican) 63.2% ▌Keith C. Davison (DFL) 36.8% |
| Minnesota 8 | John Blatnik | DFL | 1946 | Incumbent re-elected. | ▌Y John Blatnik (DFL) Unopposed |

## Mississippi

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Mississippi 1 | Thomas Abernethy | Democratic | 1942 | Incumbent re-elected. | ▌Y Thomas Abernethy (Democratic) 68.8% ▌William Alexander (Independent) 21.3% ▌Dock Drummond (Independent) 9.9% |
| Mississippi 2 | Jamie Whitten | Democratic | 1941 (special) | Incumbent re-elected. | ▌Y Jamie Whitten (Democratic) 83.5% ▌Seelig Wise (Republican) 16.5% |
| Mississippi 3 | John Bell Williams | Democratic | 1946 | Incumbent re-elected. | ▌Y John Bell Williams (Democratic) 82.4% ▌Emma Sanders (Independent) 17.6% |
| Mississippi 4 | Prentiss Walker | Republican | 1964 | Incumbent retired to run for U.S. Senator. Democratic gain. | ▌Y Sonny Montgomery (Democratic) 65.3% ▌Lewis McAllister (Republican) 32.6% ▌Sterling P. Davis (Independent) 2.2% |
| Mississippi 5 | William M. Colmer | Democratic | 1932 | Incumbent re-elected. | ▌Y William M. Colmer (Democratic) 70.0% ▌James M. Moye (Republican) 30.0% |

## Missouri

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Missouri 1 | Frank M. Karsten | Democratic | 1946 | Incumbent re-elected. | ▌Y Frank M. Karsten (Democratic) 63.9% ▌Robert L. Sharp (Republican) 36.1% |
| Missouri 2 | Thomas B. Curtis | Republican | 1950 | Incumbent re-elected. | ▌Y Thomas B. Curtis (Republican) 66.2% ▌William B. Milius (Democratic) 33.8% |
| Missouri 3 | Leonor Sullivan | Democratic | 1952 | Incumbent re-elected. | ▌Y Leonor Sullivan (Democratic) 71.1% ▌Homer McCracken (Republican) 28.9% |
| Missouri 4 | William J. Randall | Democratic | 1959 (special) | Incumbent re-elected. | ▌Y William J. Randall (Democratic) 60.9% ▌Forest Nave Jr. (Republican) 39.1% |
| Missouri 5 | Richard W. Bolling | Democratic | 1948 | Incumbent re-elected. | ▌Y Richard W. Bolling (Democratic) 61.2% ▌Willis E. Salyers (Republican) 38.8% |
| Missouri 6 | William R. Hull Jr. | Democratic | 1954 | Incumbent re-elected. | ▌Y William R. Hull Jr. (Democratic) 58.0% ▌John L. Leims (Republican) 42.0% |
| Missouri 7 | Durward G. Hall | Republican | 1960 | Incumbent re-elected. | ▌Y Durward G. Hall (Republican) 62.3% ▌Arch M. Skelton (Democratic) 37.7% |
| Missouri 8 | Richard H. Ichord Jr. | Democratic | 1960 | Incumbent re-elected. | ▌Y Richard H. Ichord Jr. (Democratic) 58.1% ▌Ben A. Rogers (Republican) 41.9% |
| Missouri 9 | William L. Hungate | Democratic | 1964 | Incumbent re-elected. | ▌Y William L. Hungate (Democratic) 55.3% ▌Anthony C. Schroeder (Republican) 44.7% |
| Missouri 10 | Paul C. Jones | Democratic | 1948 | Incumbent re-elected. | ▌Y Paul C. Jones (Democratic) 61.0% ▌William Bruckerhoff (Republican) 39.0% |

## Montana

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Montana 1 | Arnold Olsen | Democratic | 1960 | Incumbent re-elected. | ▌Y Arnold Olsen (Democratic) 50.8% ▌Dick Smiley (Republican) 49.2% |
| Montana 2 | James F. Battin | Republican | 1960 | Incumbent re-elected. | ▌Y James F. Battin (Republican) 60.2% ▌John Melcher (Democratic) 39.8% |

## Nebraska

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Nebraska 1 | Clair A. Callan | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Robert V. Denney (Republican) 51.2% ▌Clair A. Callan (Democratic) 48.8% |
| Nebraska 2 | Glenn Cunningham | Republican | 1956 | Incumbent re-elected. | ▌Y Glenn Cunningham (Republican) 64.2% ▌Richard Fellman (Democratic) 35.8% |
| Nebraska 3 | David Martin | Republican | 1960 | Incumbent re-elected. | ▌Y David Martin (Republican) 73.0% ▌John Homan (Democratic) 27.0% |

## Nevada

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Nevada at-large | Walter S. Baring Jr. | Democratic | 1948 1952 (lost) 1956 | Incumbent re-elected. | ▌Y Walter S. Baring Jr. (Democratic) 67.6% ▌Ralph L. Kraemer (Republican) 32.4% |

## New Hampshire

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| New Hampshire 1 | J. Oliva Huot | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Louis C. Wyman (Republican) 56.2% ▌J. Oliva Huot (Democratic) 43.8% |
| New Hampshire 2 | James Colgate Cleveland | Republican | 1962 | Incumbent re-elected. | ▌Y James Colgate Cleveland (Republican) 66.8% ▌William H. Barry Jr. (Democratic) 33.2% |

## New Jersey

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| New Jersey 1 | None (district created) | None (district created) | None (district created) | New seat. Republican gain. | ▌Y John E. Hunt (Republican) 51.3% ▌Michael J. Piarulli (Democratic) 46.2% ▌Elliott G. Heard Jr. (Independent) 1.4% ▌Joseph V. Hayden (Conservative) 0.7% ▌Dominic W. Doganiero (Socialist Labor) 0.1% ▌Frederick L. Compton (Peace Equal Rights) 0.1% |
| New Jersey 2 | Thomas C. McGrath Jr. | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Charles W. Sandman Jr. (Republican) 51.5% ▌Thomas C. McGrath Jr. (Democratic) 46.9% ▌Albert Ronis (Socialist Labor) 0.9% ▌Lindwood W. Erickson Jr. (Conservative) 0.7% |
| New Jersey 3 | James J. Howard | Democratic | 1964 | Incumbent re-elected. | ▌Y James J. Howard (Democratic) 52.7% ▌James M. Coleman (Republican) 46.6% ▌Martin A. Watkins (Peace Equal Rights) 0.7% |
| New Jersey 4 | Frank Thompson | Democratic | 1954 | Incumbent re-elected. | ▌Y Frank Thompson (Democratic) 56.2% ▌Ralph Clark Chandler (Republican) 43.5% ▌Joseph J. Frank (Socialist Labor) 0.3% |
| New Jersey 5 | Peter Frelinghuysen Jr. | Republican | 1952 | Incumbent re-elected. | ▌Y Peter Frelinghuysen Jr. (Republican) 70.8% ▌Carter Jefferson (Democratic) 27.1% ▌Robert G. Wright (Conservative) 2.2% |
| New Jersey 6 | William T. Cahill Redistricted from the 1st district | Republican | 1958 | Incumbent re-elected. | ▌Y William T. Cahill (Republican) 66.9% ▌Walter Dubrow (Democratic) 30.7% ▌Malcolm C. McWeeney (Conservative) 1.8% ▌Nathan Robinson (Peace Equal Rights) 0.5% ▌Bernardo S. Doganiero (Socialist Labor) 0.2% |
| New Jersey 7 | William B. Widnall | Republican | 1950 | Incumbent re-elected. | ▌Y William B. Widnall (Republican) 66.4% ▌Robert E. Hamer (Democratic) 33.6% |
| New Jersey 8 | Charles S. Joelson | Democratic | 1960 | Incumbent re-elected. | ▌Y Charles S. Joelson (Democratic) 59.6% ▌Richard M. DeMarco (Republican) 38.2% ▌Harry Santhouse (Socialist Labor) 2.2% |
| New Jersey 9 | Henry Helstoski | Democratic | 1964 | Incumbent re-elected. | ▌Y Henry Helstoski (Democratic) 50.9% ▌Frank C. Osmers Jr. (Republican) 49.1% |
| New Jersey 10 | Peter W. Rodino | Democratic | 1948 | Incumbent re-elected. | ▌Y Peter W. Rodino (Democratic) 64.3% ▌Earl Harris (Republican) 32.7% ▌Virginia Elliott (Conservative) 2.4% ▌Harry Press (Socialist Labor) 0.6% |
| New Jersey 11 | Joseph Minish | Democratic | 1962 | Incumbent re-elected. | ▌Y Joseph Minish (Democratic) 58.3% ▌Leonard J. Felzenberg (Republican) 40.8% ▌Joseph Carroll (Socialist Labor) 0.9% |
| New Jersey 12 | Florence P. Dwyer Redistricted from the 6th district | Republican | 1956 | Incumbent re-elected. | ▌Y Florence P. Dwyer (Republican) 73.9% ▌Robert F. Allen (Democratic) 23.9% ▌Howard Shershinger (Conservative) 2.1% |
| New Jersey 12 | Paul J. Krebs | Democratic | 1964 | Incumbent retired. Democratic loss. | ▌Y Florence P. Dwyer (Republican) 73.9% ▌Robert F. Allen (Democratic) 23.9% ▌Howard Shershinger (Conservative) 2.1% |
| New Jersey 13 | Neil Gallagher | Democratic | 1958 | Incumbent re-elected. | ▌Y Neil Gallagher (Democratic) 71.8% ▌Ruth Swayze (Republican) 28.2% |
| New Jersey 14 | Dominick V. Daniels | Democratic | 1958 | Incumbent re-elected. | ▌Y Dominick V. Daniels (Democratic) 68.0% ▌Thomas R. McSherry (Republican) 28.5% ▌Benjamin J. Messina (Conservative) 3.5% |
| New Jersey 15 | Edward J. Patten | Democratic | 1962 | Incumbent re-elected. | ▌Y Edward J. Patten (Democratic) 57.0% ▌C. John Stroumtsos (Republican) 41.5% ▌Albert Wasilewski (Conservative) 1.6% |

## New Mexico

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| New Mexico at-large | Thomas G. Morris | Democratic | 1958 | Incumbent re-elected. | ▌Y Thomas G. Morris (Democratic) 27.9% ▌Y E. S. Johnny Walker (Democratic) 25.3% ▌Robert C. Davidson (Republican) 24.8% ▌Schuble C. Cook (Republican) 22.0% |
| New Mexico at-large | E. S. Johnny Walker | Democratic | 1964 | Incumbent re-elected. | ▌Y Thomas G. Morris (Democratic) 27.9% ▌Y E. S. Johnny Walker (Democratic) 25.3% ▌Robert C. Davidson (Republican) 24.8% ▌Schuble C. Cook (Republican) 22.0% |

## New York

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| New York 1 | Otis G. Pike | Democratic | 1960 | Incumbent re-elected. | ▌Y Otis G. Pike (Democratic) 58.9% ▌James M. Catterson Jr. (Republican) 33.7% ▌Domenico Crachi Jr. (Conservative) 7.4% |
| New York 2 | James R. Grover Jr. | Republican | 1962 | Incumbent re-elected. | ▌Y James R. Grover Jr. (Republican) 54.7% ▌Frank M. Corso (Democratic) 34.1% ▌Edward Campbell (Conservative) 10.2% ▌John Brush (Peace) 1.0% |
| New York 3 | Lester L. Wolff | Democratic | 1964 | Incumbent re-elected. | ▌Y Lester L. Wolff (Democratic) 50.3% ▌Steven Derounian (Republican) 49.7% |
| New York 4 | John W. Wydler | Republican | 1962 | Incumbent re-elected. | ▌Y John W. Wydler (Republican) 59.7% ▌Martin Steadman (Democratic) 32.0% ▌Donald H. Serrell (Conservative) 6.9% ▌Bernard Kagel (Peace) 1.4% |
| New York 5 | Herbert Tenzer | Democratic | 1964 | Incumbent re-elected. | ▌Y Herbert Tenzer (Democratic) 49.9% ▌Thomas Brennan (Republican) 48.6% ▌Carleton M. Fisher (Peace) 1.5% |
| New York 6 | Seymour Halpern | Republican | 1958 | Incumbent re-elected. | ▌Y Seymour Halpern (Republican) 59.0% ▌Gilbert T. Redleaf (Democratic) 29.4% ▌Ronald E. Weiss (Conservative) 11.5% |
| New York 7 | Joseph P. Addabbo | Democratic | 1960 | Incumbent re-elected. | ▌Y Joseph P. Addabbo (Democratic) 64.9% ▌Louis R. Mercogliano (Republican) 24.0% ▌Raymond G. Carpenter (Conservative) 11.1% |
| New York 8 | Benjamin Rosenthal | Democratic | 1962 | Incumbent re-elected. | ▌Y Benjamin Rosenthal (Democratic) 69.6% ▌Thomas C. Gowlan (Republican) 22.1% ▌Cyrus Julien (Conservative) 8.3% |
| New York 9 | James J. Delaney | Democratic | 1944 1946 (lost) 1948 | Incumbent re-elected. | ▌Y James J. Delaney (Democratic) 53.5% ▌John F. Haggerty (Republican) 40.0% ▌David Green (Liberal) 6.5% |
| New York 10 | Emanuel Celler | Democratic | 1922 | Incumbent re-elected. | ▌Y Emanuel Celler (Democratic) 82.1% ▌Erwin A. Rosenberg (Republican) 17.9% |
| New York 11 | Eugene Keogh | Democratic | 1936 | Incumbent retired. Democratic hold. | ▌Y Frank J. Brasco (Democratic) 70.6% ▌Benjamin W. Feldman (Republican) 21.9% ▌Edward L. Johnson (Liberal) 7.5% |
| New York 12 | Edna F. Kelly | Democratic | 1949 (special) | Incumbent re-elected. | ▌Y Edna F. Kelly (Democratic) 72.7% ▌Alfred G. Walton (Republican) 24.4% ▌Herbert Aptheker (Peace and Freedom) 3.0% |
| New York 13 | Abraham J. Multer | Democratic | 1947 (special) | Incumbent re-elected. | ▌Y Abraham J. Multer (Democratic) 61.9% ▌Mary Gravina (Republican) 18.6% ▌Hershell Chanin (Liberal) 13.3% ▌Michael J. Spadaro (Conservative) 6.1% |
| New York 14 | John J. Rooney | Democratic | 1944 | Incumbent re-elected. | ▌Y John J. Rooney (Democratic) 77.6% ▌Leon F. Nadrowski (Republican) 22.4% |
| New York 15 | Hugh Carey | Democratic | 1960 | Incumbent re-elected. | ▌Y Hugh Carey (Democratic) 56.8% ▌Herbert F. Ryan (Republican) 43.2% |
| New York 16 | John M. Murphy | Democratic | 1962 | Incumbent re-elected. | ▌Y John M. Murphy (Democratic) 57.4% ▌Frank J. Biondolillo (Republican) 42.6% |
| New York 17 | Theodore R. Kupferman | Republican | 1966 (special) | Incumbent re-elected. | ▌Y Theodore R. Kupferman (Republican) 47.7% ▌Jerome L. Wilson (Democratic) 46.2% ▌Richard J. Callahan (Conservative) 6.1% |
| New York 18 | Adam Clayton Powell Jr. | Democratic | 1944 | Incumbent re-elected. | ▌Y Adam Clayton Powell Jr. (Democratic) 74.0% ▌Lassen R. Walsh (Republican) 17.5% ▌Richard Priedeaux (Liberal) 6.5% ▌Ryland E. D. Chase (Conservative) 2.0% |
| New York 19 | Leonard Farbstein | Democratic | 1956 | Incumbent re-elected. | ▌Y Leonard Farbstein (Democratic) 57.8% ▌Henry E. Del Rosso (Republican) 26.2% ▌Elaine M. Morrison (Liberal) 12.2% ▌James Weinstein (Socialist) 3.8% |
| New York 20 | William Fitts Ryan | Democratic | 1960 | Incumbent re-elected. | ▌Y William Fitts Ryan (Democratic) 74.8% ▌Norman C. Harlowe (Republican) 20.7% ▌Carolyn S. Weller (Conservative) 4.5% |
| New York 21 | James H. Scheuer | Democratic | 1964 | Incumbent re-elected. | ▌Y James H. Scheuer (Democratic) 83.6% ▌Burton Siegel (Republican) 16.4% |
| New York 22 | Jacob H. Gilbert | Democratic | 1960 | Incumbent re-elected. | ▌Y Jacob H. Gilbert (Democratic) 74.2% ▌Pedro Luis Rodriguez (Republican) 19.3% ▌Carlos Rosario (Liberal) 6.5% |
| New York 23 | Jonathan B. Bingham | Democratic | 1964 | Incumbent re-elected. | ▌Y Jonathan B. Bingham (Democratic) 73.4% ▌Harold Grosberg (Republican) 18.9% ▌Walter A. Quinn Jr. (Conservative) 7.8% |
| New York 24 | Paul A. Fino | Republican | 1952 | Incumbent re-elected. | ▌Y Paul A. Fino (Republican) 63.9% ▌Aileen B. Ryan (Democratic) 33.4% ▌John P. Hagan (Liberal) 2.7% |
| New York 25 | Richard Ottinger | Democratic | 1964 | Incumbent re-elected. | ▌Y Richard Ottinger (Democratic) 54.6% ▌Frederick J. Martin Jr. (Republican) 45.4% |
| New York 26 | Ogden R. Reid | Republican | 1962 | Incumbent re-elected. | ▌Y Ogden R. Reid (Republican) 69.3% ▌Joseph L. Hutner (Democratic) 25.4% ▌Albert M. Gants (Conservative) 5.3% |
| New York 27 | John G. Dow | Democratic | 1964 | Incumbent re-elected. | ▌Y John G. Dow (Democratic) 47.2% ▌Louis V. Mills (Republican) 44.5% ▌Frederick P. Roland (Conservative) 8.3% |
| New York 28 | Joseph Y. Resnick | Democratic | 1964 | Incumbent re-elected. | ▌Y Joseph Y. Resnick (Democratic) 50.3% ▌Hamilton Fish IV (Republican) 46.3% ▌Jean Hervey (Conservative) 2.1% ▌Eric Lindbloom (Peace) 1.3% |
| New York 29 | Leo W. O'Brien | Democratic | 1952 | Incumbent retired. Republican gain. | ▌Y Daniel E. Button (Republican) 53.3% ▌Richard J. Connors (Democratic) 45.1% ▌John Muller (Conservative) 1.6% |
| New York 30 | Carleton J. King | Republican | 1960 | Incumbent re-elected. | ▌Y Carleton J. King (Republican) 65.0% ▌John S. Hall (Democratic) 35.0% |
| New York 31 | Robert C. McEwen | Republican | 1964 | Incumbent re-elected. | ▌Y Robert C. McEwen (Republican) 67.6% ▌Raymond E. Bishop (Democratic) 32.4% |
| New York 32 | Alexander Pirnie | Republican | 1958 | Incumbent re-elected. | ▌Y Alexander Pirnie (Republican) 72.3% ▌Robert Castle (Democratic) 27.7% |
| New York 33 | Howard W. Robison | Republican | 1958 | Incumbent re-elected. | ▌Y Howard W. Robison (Republican) 65.7% ▌Blair G. Ewing (Democratic) 34.0% ▌Joe Griffith (write-in) 0.3% |
| New York 34 | James M. Hanley | Democratic | 1964 | Incumbent re-elected. | ▌Y James M. Hanley (Democratic) 55.1% ▌Stewart F. Hancock Jr. (Republican) 38.3% ▌Benjamin K. Souler (Conservative) 3.6% ▌Norman Balabanian (Liberal) 3.0% |
| New York 35 | Samuel S. Stratton | Democratic | 1958 | Incumbent re-elected. | ▌Y Samuel S. Stratton (Democratic) 65.8% ▌Frederick D. Dugan (Republican) 34.2% |
| New York 36 | Frank Horton | Republican | 1962 | Incumbent re-elected. | ▌Y Frank Horton (Republican) 67.3% ▌Milo Thomas (Democratic) 22.6% ▌Robert H. Detig (Conservative) 6.4% ▌Donald P. Feder (Liberal) 3.7% |
| New York 37 | Barber Conable | Republican | 1964 | Incumbent re-elected. | ▌Y Barber Conable (Republican) 67.7% ▌Kenneth Hed (Democratic) 30.0% ▌Jerome Balter (Liberal) 2.4% |
| New York 38 | Charles Goodell | Republican | 1959 (special) | Incumbent re-elected. | ▌Y Charles Goodell (Republican) 67.2% ▌Edison LeRoy Jr. (Democratic) 29.3% ▌Charles F. Schwartz (Liberal) 2.1% ▌Lloyd R. Murphy (Conservative) 1.4% |
| New York 39 | Richard D. McCarthy | Democratic | 1964 | Incumbent re-elected. | ▌Y Richard D. McCarthy (Democratic) 52.3% ▌John R. Pillion (Republican) 47.7% |
| New York 40 | Henry P. Smith III | Republican | 1964 | Incumbent re-elected. | ▌Y Henry P. Smith III (Republican) 61.2% ▌William Levitt (Democratic) 38.8% |
| New York 41 | Thaddeus J. Dulski | Democratic | 1958 | Incumbent re-elected. | ▌Y Thaddeus J. Dulski (Democratic) 76.4% ▌Francis X. Schwab Jr. (Republican) 23.6% |

## North Carolina

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| North Carolina 1 | Walter B. Jones Sr. | Democratic | 1966 (special) | Incumbent re-elected. | ▌Y Walter B. Jones Sr. (Democratic) 61.3% ▌John Porter East (Republican) 38.7% |
| North Carolina 2 | Lawrence H. Fountain | Democratic | 1952 | Incumbent re-elected. | ▌Y Lawrence H. Fountain (Democratic) 64.9% ▌Reece B. Gardner (Republican) 35.1% |
| North Carolina 3 | David N. Henderson | Democratic | 1960 | Incumbent re-elected. | ▌Y David N. Henderson (Democratic) Unopposed |
| North Carolina 4 | Harold D. Cooley | Democratic | 1934 | Incumbent lost re-election. Republican gain. | ▌Y Jim Gardner (Republican) 56.5% ▌Harold D. Cooley (Democratic) 43.5% |
| North Carolina 5 | Ralph James Scott | Democratic | 1956 | Incumbent retired. Democratic hold. | ▌Y Nick Galifianakis (Democratic) 53.1% ▌G. Fred Steele Jr. (Republican) 46.9% |
| North Carolina 6 | Horace R. Kornegay | Democratic | 1960 | Incumbent re-elected. | ▌Y Horace R. Kornegay (Democratic) 51.6% ▌Richard B. Barnwell (Republican) 48.4% |
| North Carolina 7 | Alton Lennon | Democratic | 1956 | Incumbent re-elected. | ▌Y Alton Lennon (Democratic) Unopposed |
| North Carolina 8 | Charles R. Jonas | Republican | 1952 | Incumbent re-elected. | ▌Y Charles R. Jonas (Republican) 71.5% ▌John G. Plumides (Democratic) 28.5% |
| North Carolina 9 | Jim Broyhill | Republican | 1962 | Incumbent re-elected. | ▌Y Jim Broyhill (Republican) 63.3% ▌Robert Bingham (Democratic) 36.7% |
| North Carolina 10 | Basil Whitener | Democratic | 1956 | Incumbent re-elected. | ▌Y Basil Whitener (Democratic) 56.1% ▌W. Hall Young (Republican) 43.9% |
| North Carolina 11 | Roy A. Taylor | Democratic | 1960 | Incumbent re-elected. | ▌Y Roy A. Taylor (Democratic) 52.8% ▌W. Scott Harvey (Republican) 47.2% |

## North Dakota

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| North Dakota 1 | Mark Andrews | Republican | 1963 (special) | Incumbent re-elected. | ▌Y Mark Andrews (Republican) 66.2% ▌Buckshot Hoffner (Democratic-NPL) 33.8% |
| North Dakota 2 | Rolland W. Redlin | Democratic-NPL | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Thomas S. Kleppe (Republican) 51.9% ▌Rolland W. Redlin (Democratic-NPL) 48.1% |

## Ohio

Ohio redistricted its at-large seat into a 24th district, splitting out the counties to the southwest of Dayton from the city itself, as well as moving a district in southeastern Ohio into the Columbus area.
| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Ohio 1 | John J. Gilligan | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Robert Taft Jr. (Republican) 52.9% ▌John J. Gilligan (Democratic) 47.1% |
| Ohio 2 | Donald D. Clancy | Republican | 1960 | Incumbent re-elected. | ▌Y Donald D. Clancy (Republican) 70.7% ▌Thomas E. Anderson (Democratic) 29.3% |
| Ohio 3 | Rodney M. Love | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Charles W. Whalen Jr. (Republican) 53.8% ▌Rodney M. Love (Democratic) 46.2% |
| Ohio 4 | William M. McCulloch | Republican | 1947 (special) | Incumbent re-elected. | ▌Y William M. McCulloch (Republican) 63.6% ▌Robert H. Mihlbaugh (Democratic) 36.4% |
| Ohio 5 | Del Latta | Republican | 1958 | Incumbent re-elected. | ▌Y Del Latta (Republican) 75.3% ▌John H. Shock (Democratic) 24.7% |
| Ohio 6 | Bill Harsha | Republican | 1960 | Incumbent re-elected. | ▌Y Bill Harsha (Republican) 67.9% ▌Ottie W. Reno (Democratic) 32.1% |
| Ohio 7 | Bud Brown | Republican | 1965 | Incumbent re-elected. | ▌Y Bud Brown (Republican) Unopposed |
| Ohio 8 | Jackson Edward Betts | Republican | 1950 | Incumbent re-elected. | ▌Y Jackson Edward Betts (Republican) 67.1% ▌Frank Bennett (Democratic) 32.9% |
| Ohio 9 | Thomas L. Ashley | Democratic | 1954 | Incumbent re-elected. | ▌Y Thomas L. Ashley (Democratic) 60.8% ▌Jane M. Kuebbeler (Republican) 39.2% |
| Ohio 10 | Walter H. Moeller | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Clarence E. Miller (Republican) 52.0% ▌Walter H. Moeller (Democratic) 48.0% |
| Ohio 11 | J. William Stanton | Republican | 1964 | Incumbent re-elected. | ▌Y J. William Stanton (Republican) 69.3% ▌James F. Henderson (Democratic) 30.7% |
| Ohio 12 | Samuel L. Devine | Republican | 1958 | Incumbent re-elected. | ▌Y Samuel L. Devine (Republican) 64.2% ▌Bob Shamansky (Democratic) 35.8% |
| Ohio 13 | Charles Adams Mosher | Republican | 1960 | Incumbent re-elected. | ▌Y Charles Adams Mosher (Republican) 65.5% ▌Thomas E. Wolfe (Democratic) 34.5% |
| Ohio 14 | William Hanes Ayres | Republican | 1950 | Incumbent re-elected. | ▌Y William Hanes Ayres (Republican) 59.6% ▌Charles F. Madden Jr. (Democratic) 40.4% |
| Ohio 15 | None (district created) | None (district created) | None (district created) | New seat. Republican gain. | ▌Y Chalmers Wylie (Republican) 59.9% ▌Robert L. Van Heyde (Republican) 40.1% |
| Ohio 16 | Frank T. Bow | Republican | 1950 | Incumbent re-elected. | ▌Y Frank T. Bow (Republican) 61.1% ▌Robert D. Freeman (Democratic) 38.9% |
| Ohio 17 | John M. Ashbrook | Republican | 1960 | Incumbent re-elected. | ▌Y John M. Ashbrook (Republican) 55.3% ▌Robert T. Secrest (Democratic) 44.7% |
| Ohio 17 | Robert T. Secrest Redistricted from the 15th district | Democratic | 1962 | Incumbent lost re-election. Democratic loss. | ▌Y John M. Ashbrook (Republican) 55.3% ▌Robert T. Secrest (Democratic) 44.7% |
| Ohio 18 | Wayne Hays | Democratic | 1948 | Incumbent re-elected. | ▌Y Wayne Hays (Democratic) 64.1% ▌William H. Weir (Republican) 35.9% |
| Ohio 19 | Michael J. Kirwan | Democratic | 1936 | Incumbent re-elected. | ▌Y Michael J. Kirwan (Democratic) 71.9% ▌Donald J. Lewis (Republican) 28.1% |
| Ohio 20 | Michael A. Feighan | Democratic | 1942 | Incumbent re-elected. | ▌Y Michael A. Feighan (Democratic) 76.1% ▌Clarence E. McLeod (Republican) 23.9% |
| Ohio 21 | Charles Vanik | Democratic | 1954 | Incumbent re-elected. | ▌Y Charles Vanik (Democratic) 81.7% ▌Frederick M. Coleman (Republican) 18.3% |
| Ohio 22 | Frances P. Bolton | Republican | 1940 | Incumbent re-elected. | ▌Y Frances P. Bolton (Republican) 55.9% ▌Anthony O. Calabrese Jr. (Democratic) 44.1% |
| Ohio 23 | William E. Minshall Jr. | Republican | 1954 | Incumbent re-elected. | ▌Y William E. Minshall Jr. (Republican) 73.2% ▌Sheldon D. Clark (Democratic) 26.8% |
| Ohio 24 | Robert E. Sweeney Redistricted from the at-large district | Democratic | 1964 | Incumbent retired. Republican gain. | ▌Y Buz Lukens (Republican) 58.5% ▌James H. Pelley (Democratic) 41.5% |

## Oklahoma

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Oklahoma 1 | Page Belcher | Republican | 1950 | Incumbent re-elected. | ▌Y Page Belcher (Republican) 69.7% ▌Ed Cadenhead (Democratic) 30.3% |
| Oklahoma 2 | Ed Edmondson | Democratic | 1952 | Incumbent re-elected. | ▌Y Ed Edmondson (Democratic) 53.6% ▌Denzil Garrison (Republican) 46.4% |
| Oklahoma 3 | Carl Albert | Democratic | 1946 | Incumbent re-elected. | ▌Y Carl Albert (Democratic) 77.2% ▌Whit Pate (Republican) 22.8% |
| Oklahoma 4 | Tom Steed | Democratic | 1948 | Incumbent re-elected. | ▌Y Tom Steed (Democratic) 50.2% ▌Truman T. Branscum (Republican) 49.8% |
| Oklahoma 5 | John Jarman | Democratic | 1950 | Incumbent re-elected. | ▌Y John Jarman (Democratic) 69.6% ▌Melvin H. Gragg (Republican) 30.4% |
| Oklahoma 6 | Jed Johnson Jr. | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y James Vernon Smith (Republican) 51.4% ▌Jed Johnson Jr. (Democratic) 48.6% |

## Oregon

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Oregon 1 | Wendell Wyatt | Republican | 1964 | Incumbent re-elected. | ▌Y Wendell Wyatt (Republican) 74.3% ▌Malcolm Cross (Democratic) 25.7% |
| Oregon 2 | Al Ullman | Democratic | 1956 | Incumbent re-elected. | ▌Y Al Ullman (Democratic) 63.3% ▌Everett J. Thoren (Republican) 36.7% |
| Oregon 3 | Edith Green | Democratic | 1954 | Incumbent re-elected. | ▌Y Edith Green (Democratic) 67.0% ▌Lyle Dean (Republican) 33.0% |
| Oregon 4 | Robert B. Duncan | Democratic | 1962 | Incumbent retired to run for U.S. Senator. Republican gain. | ▌Y John R. Dellenback (Republican) 62.7% ▌Charles O. Porter (Democratic) 37.3% |

## Pennsylvania

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Pennsylvania 1 | William A. Barrett | Democratic | 1944 1946 (lost) 1948 | Incumbent re-elected. | ▌Y William A. Barrett (Democratic) 66.1% ▌Beatrice Chernock (Republican) 33.9% |
| Pennsylvania 2 | Robert N. C. Nix Sr. | Democratic | 1958 | Incumbent re-elected. | ▌Y Robert N. C. Nix Sr. (Democratic) 59.9% ▌Herbert R. Cain Jr. (Republican) 40.1% |
| Pennsylvania 3 | James A. Byrne | Democratic | 1952 | Incumbent re-elected. | ▌Y James A. Byrne (Democratic) 56.6% ▌Walter T. Darmopray (Republican) 43.4% |
| Pennsylvania 4 | Herman Toll | Democratic | 1958 | Incumbent retired. Democratic hold. | ▌Y Joshua Eilberg (Democratic) 51.9% ▌Robert Bear Cohen (Republican) 48.1% |
| Pennsylvania 5 | William J. Green III | Democratic | 1964 | Incumbent re-elected. | ▌Y William J. Green III (Democratic) 59.1% ▌Michael J. Bednarek (Republican) 40.9% |
| Pennsylvania 6 | George M. Rhodes | Democratic | 1948 | Incumbent re-elected. | ▌Y George M. Rhodes (Democratic) 56.1% ▌Daniel B. Boyer Jr. (Republican) 43.9% |
| Pennsylvania 7 | None (district created) | None (district created) | None (district created) | New seat. Republican gain. | ▌Y Lawrence G. Williams (Republican) 63.2% ▌John J. Logue (Democratic) 36.8% |
| Pennsylvania 8 | Willard S. Curtin | Republican | 1956 | Incumbent retired. Republican hold. | ▌Y Edward G. Biester Jr. (Republican) 59.1% ▌Walter S. Farley Jr. (Democratic) 40.9% |
| Pennsylvania 9 | George Watkins Redistricted from the 7th district | Republican | 1964 | Incumbent re-elected. | ▌Y George Watkins (Republican) 62.6% ▌John A. O'Brien (Democratic) 37.4% |
| Pennsylvania 9 | Paul B. Dague | Republican | 1946 | Incumbent retired. Republican loss. | ▌Y George Watkins (Republican) 62.6% ▌John A. O'Brien (Democratic) 37.4% |
| Pennsylvania 10 | Joseph M. McDade | Republican | 1962 | Incumbent re-elected. | ▌Y Joseph M. McDade (Republican) 66.8% ▌Neil Trama (Democratic) 33.2% |
| Pennsylvania 11 | Dan Flood | Democratic | 1944 1946 (lost) 1948 1952 (lost) 1954 | Incumbent re-elected. | ▌Y Dan Flood (Democratic) 67.2% ▌Gerald C. Broadt (Republican) 32.8% |
| Pennsylvania 12 | J. Irving Whalley | Republican | 1960 | Incumbent re-elected. | ▌Y J. Irving Whalley (Republican) 66.9% ▌J. Robert Rohm (Democratic) 33.1% |
| Pennsylvania 13 | Richard Schweiker | Republican | 1960 | Incumbent re-elected. | ▌Y Richard Schweiker (Republican) 72.5% ▌William D. Searle (Democratic) 27.5% |
| Pennsylvania 14 | William S. Moorhead | Democratic | 1958 | Incumbent re-elected. | ▌Y William S. Moorhead (Democratic) 68.3% ▌Dick Thornburgh (Republican) 31.7% |
| Pennsylvania 15 | Fred B. Rooney | Democratic | 1963 (special) | Incumbent re-elected. | ▌Y Fred B. Rooney (Democratic) 52.4% ▌George J. Joseph (Republican) 47.6% |
| Pennsylvania 16 | John C. Kunkel | Republican | 1961 (special) | Incumbent retired. Republican hold. | ▌Y Edwin D. Eshleman (Republican) 69.2% ▌Richard F. Charles (Democratic) 30.8% |
| Pennsylvania 17 | Herman T. Schneebeli | Republican | 1960 | Incumbent re-elected. | ▌Y Herman T. Schneebeli (Republican) 66.2% ▌William Conrad Reuter (Democratic) 33.8% |
| Pennsylvania 18 | Robert J. Corbett | Republican | 1938 1940 (lost) 1944 | Incumbent re-elected. | ▌Y Robert J. Corbett (Republican) 67.1% ▌John R. Wohlfarth (Democratic) 32.9% |
| Pennsylvania 19 | Nathaniel N. Craley Jr. | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y George A. Goodling (Republican) 51.7% ▌Nathaniel N. Craley Jr. (Democratic) 48.3% |
| Pennsylvania 20 | Elmer J. Holland | Democratic | 1942 (special) 1942 (retired) 1956 (special) | Incumbent re-elected. | ▌Y Elmer J. Holland (Democratic) 65.9% ▌Joseph Sabol Jr. (Republican) 34.1% |
| Pennsylvania 21 | John Herman Dent | Democratic | 1958 | Incumbent re-elected. | ▌Y John Herman Dent (Democratic) 64.2% ▌Edward B. Byrne (Republican) 35.8% |
| Pennsylvania 22 | John P. Saylor | Republican | 1949 (special) | Incumbent re-elected. | ▌Y John P. Saylor (Republican) 67.5% ▌Frank H. Buck (Democratic) 32.5% |
| Pennsylvania 23 | Albert W. Johnson | Republican | 1963 (special) | Incumbent re-elected. | ▌Y Albert W. Johnson (Republican) 62.8% ▌Robert Mitchell (Democratic) 37.2% |
| Pennsylvania 24 | Joseph P. Vigorito | Democratic | 1964 | Incumbent re-elected. | ▌Y Joseph P. Vigorito (Democratic) 55.3% ▌James D. Weaver (Republican) 44.7% |
| Pennsylvania 25 | Frank M. Clark | Democratic | 1954 | Incumbent re-elected. | ▌Y Frank M. Clark (Democratic) 64.5% ▌John F. Heath (Republican) 35.5% |
| Pennsylvania 26 | Thomas E. Morgan | Democratic | 1944 | Incumbent re-elected. | ▌Y Thomas E. Morgan (Democratic) 64.1% ▌Paul P. Riggle (Republican) 35.9% |
| Pennsylvania 27 | James G. Fulton | Republican | 1944 | Incumbent re-elected. | ▌Y James G. Fulton (Republican) 67.7% ▌Stephen J. Arnold (Democratic) 32.3% |

## Rhode Island

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Rhode Island 1 | Fernand St Germain | Democratic | 1960 | Incumbent re-elected. | ▌Y Fernand St Germain (Democratic) 56.8% ▌Raymond W. Houghton (Republican) 43.2% |
| Rhode Island 2 | John E. Fogarty | Democratic | 1940 | Incumbent re-elected. | ▌Y John E. Fogarty (Democratic) 64.7% ▌Everett C. Sammartino (Republican) 35.3% |

## South Carolina

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| South Carolina 1 | L. Mendel Rivers | Democratic | 1940 | Incumbent re-elected. | ▌Y L. Mendel Rivers (Democratic) Unopposed |
| South Carolina 2 | Albert Watson | Republican | 1962 | Incumbent re-elected. | ▌Y Albert Watson (Republican) 64.3% ▌Fred LeClercq (Democratic) 35.7% |
| South Carolina 3 | William J. B. Dorn | Democratic | 1946 1948 (retired) 1950 | Incumbent re-elected. | ▌Y William J. B. Dorn (Democratic) 57.8% ▌John Grisso (Republican) 42.2% |
| South Carolina 4 | Robert T. Ashmore | Democratic | 1953 (special) | Incumbent re-elected. | ▌Y Robert T. Ashmore (Democratic) Unopposed |
| South Carolina 5 | Thomas S. Gettys | Democratic | 1964 | Incumbent re-elected. | ▌Y Thomas S. Gettys (Democratic) Unopposed |
| South Carolina 6 | John L. McMillan | Democratic | 1938 | Incumbent re-elected. | ▌Y John L. McMillan (Democratic) 61.7% ▌Archie Odom (Republican) 38.3% |

## South Dakota

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| South Dakota 1 | Ben Reifel | Republican | 1960 | Incumbent re-elected. | ▌Y Ben Reifel (Republican) 66.7% ▌Francis Richter (Democratic) 33.3% |
| South Dakota 2 | E. Y. Berry | Republican | 1950 | Incumbent re-elected. | ▌Y E. Y. Berry (Republican) 60.5% ▌Jack P. Allmon (Democratic) 39.5% |

## Tennessee

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Tennessee 1 | Jimmy Quillen | Republican | 1962 | Incumbent re-elected. | ▌Y Jimmy Quillen (Republican) 87.1% ▌Temus Bright (Independent) 12.9% |
| Tennessee 2 | John Duncan Sr. | Republican | 1964 | Incumbent re-elected. | ▌Y John Duncan Sr. (Republican) 78.9% ▌Jake Armstrong (Democratic) 21.1% |
| Tennessee 3 | Bill Brock | Republican | 1962 | Incumbent re-elected. | ▌Y Bill Brock (Republican) 64.2% ▌Franklin Haney (Democratic) 35.8% |
| Tennessee 4 | Joe L. Evins | Democratic | 1946 | Incumbent re-elected. | ▌Y Joe L. Evins (Democratic) 90.0% ▌William Bean (Independent) 10.0% |
| Tennessee 5 | Richard Fulton | Democratic | 1962 | Incumbent re-elected. | ▌Y Richard Fulton (Democratic) 63.0% ▌George Kelly (Republican) 37.0% |
| Tennessee 6 | William Anderson | Democratic | 1964 | Incumbent re-elected. | ▌Y William Anderson (Democratic) 79.6% ▌Cecil R. Hill (Independent) 20.4% |
| Tennessee 7 | Tom J. Murray | Democratic | 1942 | Incumbent lost renomination. Democratic hold. | ▌Y Ray Blanton (Democratic) 50.6% ▌Julius Hurst (Republican) 48.4% ▌L. B. Winfield (Independent) 1.0% |
| Tennessee 8 | Fats Everett | Democratic | 1958 | Incumbent re-elected. | ▌Y Fats Everett (Democratic) 75.2% ▌Jim Boyd (Republican) 24.8% |
| Tennessee 9 | George W. Grider | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Dan Kuykendall (Republican) 52.2% ▌George W. Grider (Democratic) 47.8% |

## Texas

Texas redistricted for this election, eliminating its at-large district and removing two East Texas districts in favor of adding three districts in South Texas, suburban Houston, and suburban Dallas.
| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Texas 1 | Wright Patman | Democratic | 1928 | Incumbent re-elected. | ▌Y Wright Patman (Democratic) Unopposed |
| Texas 2 | John Dowdy Redistricted from the 7th district | Democratic | 1952 | Incumbent re-elected. | ▌Y John Dowdy (Democratic) Unopposed |
| Texas 3 | Joe R. Pool Redistricted from the at-large seat | Democratic | 1962 | Incumbent re-elected. | ▌Y Joe R. Pool (Democratic) 53.4% ▌Bill Hayes (Republican) 46.6% |
| Texas 4 | Ray Roberts | Democratic | 1962 | Incumbent re-elected. | ▌Y Ray Roberts (Democratic) Unopposed |
| Texas 4 | Lindley Beckworth Redistricted from the 3rd district | Democratic | 1956 | Incumbent lost renomination. Democratic loss. | ▌Y Ray Roberts (Democratic) Unopposed |
| Texas 5 | Earle Cabell | Democratic | 1964 | Incumbent re-elected. | ▌Y Earle Cabell (Democratic) 61.0% ▌Duke Burgess (Republican) 39.0% |
| Texas 6 | Olin E. Teague | Democratic | 1946 | Incumbent re-elected. | ▌Y Olin E. Teague (Democratic) Unopposed |
| Texas 7 | None (district created) | None (district created) | None (district created) | New seat. Republican gain. | ▌Y George H. W. Bush (Republican) 57.1% ▌Frank Briscoe (Democratic) 42.4% ▌Bob Gray (Constitution) 0.5% |
| Texas 8 | Lera Millard Thomas | Democratic | 1966 | Incumbent retired. Democratic hold. | ▌Y Robert C. Eckhardt (Democratic) 92.3% ▌W. D. Spayne (Republican) 7.7% |
| Texas 9 | Jack Brooks Redistricted from the 2nd district | Democratic | 1952 | Incumbent re-elected. | ▌Y Jack Brooks (Democratic) Unopposed |
| Texas 9 | Clark W. Thompson | Democratic | 1947 (special) | Incumbent retired. Democratic loss. | ▌Y Jack Brooks (Democratic) Unopposed |
| Texas 10 | J. J. Pickle | Democratic | 1963 (special) | Incumbent re-elected. | ▌Y J. J. Pickle (Democratic) 74.3% ▌Jane Sumner (Republican) 24.6% ▌R. R. Richter (Constitution) 1.1% |
| Texas 11 | William R. Poage | Democratic | 1936 | Incumbent re-elected. | ▌Y William R. Poage (Democratic) 94.9% ▌Laurel N. Dunn (Conservative) 5.1% |
| Texas 12 | Jim Wright | Democratic | 1954 | Incumbent re-elected. | ▌Y Jim Wright (Democratic) Unopposed |
| Texas 13 | Graham B. Purcell Jr. | Democratic | 1962 | Incumbent re-elected. | ▌Y Graham B. Purcell Jr. (Democratic) 57.1% ▌D. C. Norwood (Republican) 42.9% |
| Texas 14 | John Andrew Young | Democratic | 1956 | Incumbent re-elected. | ▌Y John Andrew Young (Democratic) Unopposed |
| Texas 15 | Kika de la Garza | Democratic | 1964 | Incumbent re-elected. | ▌Y Kika de la Garza (Democratic) Unopposed |
| Texas 16 | Richard Crawford White | Democratic | 1964 | Incumbent re-elected. | ▌Y Richard Crawford White (Democratic) Unopposed |
| Texas 17 | Omar Burleson | Democratic | 1946 | Incumbent re-elected. | ▌Y Omar Burleson (Democratic) Unopposed |
| Texas 18 | Walter E. Rogers | Democratic | 1950 | Incumbent retired. Republican gain. | ▌Y Robert Price (Republican) 59.5% ▌Dee Miller (Democratic) 40.5% |
| Texas 19 | George H. Mahon | Democratic | 1934 | Incumbent re-elected. | ▌Y George H. Mahon (Democratic) Unopposed |
| Texas 20 | Henry B. González | Democratic | 1961 (special) | Incumbent re-elected. | ▌Y Henry B. González (Democratic) 87.1% ▌Robert C. Moore (Conservative) 7.8% ▌Bert Ellis (Constitution) 5.1% |
| Texas 21 | O. C. Fisher | Democratic | 1942 | Incumbent re-elected. | ▌Y O. C. Fisher (Democratic) Unopposed |
| Texas 22 | Robert R. Casey | Democratic | 1958 | Incumbent re-elected. | ▌Y Robert R. Casey (Democratic) Unopposed |
| Texas 23 | None (district created) | None (district created) | None (district created) | New seat. Democratic gain. | ▌Y Abraham Kazen (Democratic) 96.4% ▌Richard K. Troxell (Constitution) 3.6% |

## Utah

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Utah 1 | Laurence J. Burton | Republican | 1962 | Incumbent re-elected. | ▌Y Laurence J. Burton (Republican) 66.5% ▌J. Keith Melville (Democratic) 33.5% |
| Utah 2 | David S. King | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Sherman P. Lloyd (Republican) 61.3% ▌David S. King (Democratic) 38.7% |

## Vermont

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Vermont at-large | Robert Stafford | Republican | 1960 | Incumbent re-elected. | ▌Y Robert Stafford (Republican) 65.6% ▌William J. Ryan (Democratic) 34.4% |

## Virginia

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Virginia 1 | Thomas N. Downing | Democratic | 1958 | Incumbent re-elected. | ▌Y Thomas N. Downing (Democratic) Unopposed |
| Virginia 2 | Porter Hardy Jr. | Democratic | 1946 | Incumbent re-elected. | ▌Y Porter Hardy Jr. (Democratic) Unopposed |
| Virginia 3 | David E. Satterfield III | Democratic | 1964 | Incumbent re-elected. | ▌Y David E. Satterfield III (Democratic) Unopposed |
| Virginia 4 | Watkins Abbitt | Democratic | 1948 | Incumbent re-elected. | ▌Y Watkins Abbitt (Democratic) 66.5% ▌Edward J. SIlverman (Independent) 21.8% ▌Others 11.6% |
| Virginia 5 | William M. Tuck | Democratic | 1953 (special) | Incumbent re-elected. | ▌Y William M. Tuck (Democratic) 56.2% ▌Robert L. Gilliam (Republican) 43.8% |
| Virginia 6 | Richard H. Poff | Republican | 1952 | Incumbent re-elected. | ▌Y Richard H. Poff (Republican) 80.8% ▌Murray A. Stoller (Democratic) 19.2% |
| Virginia 7 | John O. Marsh Jr. | Democratic | 1962 | Incumbent re-elected. | ▌Y John O. Marsh Jr. (Democratic) 59.3% ▌Edward O. McCue III (Republican) 40.7% |
| Virginia 8 | Howard W. Smith | Democratic | 1930 | Incumbent lost renomination. Republican gain. | ▌Y William L. Scott (Republican) 57.2% ▌George Rawlings (Democratic) 42.8% |
| Virginia 9 | W. Pat Jennings | Democratic | 1954 | Incumbent lost re-election. Republican gain. | ▌Y William C. Wampler (Republican) 53.7% ▌W. Pat Jennings (Democratic) 46.3% |
| Virginia 10 | Joel Broyhill | Republican | 1952 | Incumbent re-elected. | ▌Y Joel Broyhill (Republican) 58.3% ▌Clive L. DuVal II (Democratic) 41.7% |

## Washington

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Washington 1 | Thomas Pelly | Republican | 1952 | Incumbent re-elected. | ▌Y Thomas Pelly (Republican) 80.3% ▌Alice Franklin Bryant (Democratic) 19.7% |
| Washington 2 | Lloyd Meeds | Democratic | 1964 | Incumbent re-elected. | ▌Y Lloyd Meeds (Democratic) 60.7% ▌Eugene M. Smith (Republican) 36.0% ▌George E. Pittan (Conservative) 2.4% ▌Frank L. Batterson (Peace and Freedom) 0.9% |
| Washington 3 | Julia Butler Hansen | Democratic | 1960 | Incumbent re-elected. | ▌Y Julia Butler Hansen (Democratic) 65.7% ▌Keith Kisor (Republican) 34.3% |
| Washington 4 | Catherine Dean May | Republican | 1958 | Incumbent re-elected. | ▌Y Catherine Dean May (Republican) 62.1% ▌Gustav Bansmer (Democratic) 30.3% ▌Floyd Paxton (Conservative) 7.6% |
| Washington 5 | Tom Foley | Democratic | 1964 | Incumbent re-elected. | ▌Y Tom Foley (Democratic) 56.5% ▌Dorothy R. Powers (Republican) 43.5% |
| Washington 6 | Floyd Hicks | Democratic | 1964 | Incumbent re-elected. | ▌Y Floyd Hicks (Democratic) 60.4% ▌George Mahler (Republican) 39.6% |
| Washington 7 | Brock Adams | Democratic | 1964 | Incumbent re-elected. | ▌Y Brock Adams (Democratic) 62.8% ▌James Munn (Republican) 36.0% ▌Robert B. Shaw (Peace and Freedom) 1.2% |

## West Virginia

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| West Virginia 1 | Arch A. Moore Jr. | Republican | 1956 | Incumbent re-elected. | ▌Y Arch A. Moore Jr. (Republican) 70.9% ▌William M. Kidd (Democratic) 29.1% |
| West Virginia 2 | Harley Orrin Staggers | Democratic | 1948 | Incumbent re-elected. | ▌Y Harley Orrin Staggers (Democratic) 60.3% ▌George L. Strader (Republican) 39.7% |
| West Virginia 3 | John M. Slack Jr. | Democratic | 1958 | Incumbent re-elected. | ▌Y John M. Slack Jr. (Democratic) 61.6% ▌Mal Guthrie (Republican) 38.4% |
| West Virginia 4 | Ken Hechler | Democratic | 1958 | Incumbent re-elected. | ▌Y Ken Hechler (Democratic) 59.7% ▌Harry D. Humphreys (Republican) 40.3% |
| West Virginia 5 | James Kee | Democratic | 1964 | Incumbent re-elected. | ▌Y James Kee (Democratic) 63.6% ▌Elizabeth Ann Bowen (Republican) 36.4% |

## Wisconsin

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Wisconsin 1 | Lynn E. Stalbaum | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y Henry C. Schadeberg (Republican) 51.0% ▌Lynn E. Stalbaum (Democratic) 49.0% |
| Wisconsin 2 | Robert Kastenmeier | Democratic | 1958 | Incumbent re-elected. | ▌Y Robert Kastenmeier (Democratic) 58.0% ▌William B. Smith (Republican) 42.0% |
| Wisconsin 3 | Vernon W. Thomson | Republican | 1960 | Incumbent re-elected. | ▌Y Vernon W. Thomson (Republican) 68.8% ▌John D. Rice (Democratic) 31.2% |
| Wisconsin 4 | Clement Zablocki | Democratic | 1948 | Incumbent re-elected. | ▌Y Clement Zablocki (Democratic) 74.3% ▌James E. Laessig (Republican) 25.7% |
| Wisconsin 5 | Henry S. Reuss | Democratic | 1954 | Incumbent re-elected. | ▌Y Henry S. Reuss (Democratic) 70.0% ▌Curtis T. Pechtel (Republican) 29.7% ▌James E. Boulton (Independent) 0.3% |
| Wisconsin 6 | John Abner Race | Democratic | 1964 | Incumbent lost re-election. Republican gain. | ▌Y William A. Steiger (Republican) 52.4% ▌John Abner Race (Democratic) 47.6% |
| Wisconsin 7 | Melvin Laird | Republican | 1952 | Incumbent re-elected. | ▌Y Melvin Laird (Republican) 65.1% ▌Norman Myhra (Democratic) 34.9% |
| Wisconsin 8 | John W. Byrnes | Republican | 1944 | Incumbent re-elected. | ▌Y John W. Byrnes (Republican) 61.3% ▌Marvin S. Kagen (Democratic) 38.7% |
| Wisconsin 9 | Glenn Robert Davis | Republican | 1947 (special) 1956 (retired) 1964 | Incumbent re-elected. | ▌Y Glenn Robert Davis (Republican) 64.1% ▌James P. Buckley (Democratic) 35.9% |
| Wisconsin 10 | Alvin O'Konski | Republican | 1942 | Incumbent re-elected. | ▌Y Alvin O'Konski (Republican) 66.5% ▌Carl Lauri (Democratic) 33.5% |

## Wyoming

| District | Incumbent | Incumbent | Incumbent | This race | This race |
| District | Member | Party | First elected | Results | Candidates |
| Wyoming at-large | Teno Roncalio | Democratic | 1964 | Incumbent retired to run for U.S. Senator. Republican gain. | ▌Y William Henry Harrison III (Republican) 52.7% ▌Al Christian (Democratic) 47.3% |