# 1958 United States Senate elections

The 1958 United States Senate elections were elections for the United States Senate which occurred in the middle of President Dwight D. Eisenhower's second term. Thirty-two seats of Class 1 were contested in regular elections, the new state of Alaska held its first Senate elections for its Class 2 and 3 seats, and two special elections were held to fill vacancies.
As is common in mid-term elections, the party in the White House lost seats, but losses this year were heavy due to the Recession of 1958, the Eisenhower Administration's position on right-to-work issues that galvanized labor unions which supported Democrats, and the launch of Sputnik. This was the first time since 1934 that Democrats gained seats in this class of Senators. Democrats won both seats in West Virginia, making the last time that Democrats simultaneously flipped both of a state's Senate seats until Georgia's elections in 2020 and 2021.
The Democratic Party gained a record 15 seats in this election, defeating 10 Republican incumbents, gaining three open Republican seats, and winning both seats from the new state of Alaska. This gave the Democrats a strong Senate majority of 64–34 over the Republicans, and the largest swing in the history of the Senate. After the new state of Hawaii elected its first Senators in 1959, the Senate's balance changed to 65–35.
This is only one of two occasions in U.S. history that 10 or more Senate seats changed hands in a mid-term election (the other being in 1946), and also one of five occasions where 10 or more Senate seats changed hands in an election, with the other occasions being in 1920, 1932, 1946, and 1980.

## Results summary

| 64 | 34 |
| Democratic | Republican |
For the November 5 and 25, 1958 regular and special elections.
Colored shading indicates party with largest share of that row.
| Parties | Parties | | | | Total |
| Parties | Parties | Democratic | Republican | Other | Total |
| Last elections (1956) Before these elections | Last elections (1956) Before these elections | 49 | 47 | 0 | 96 |
| Not up | Not up | 36 | 26 | 0 | 62 |
| | Class 2 (1954) | 19 | 11 | 0 | 30 |
| | Class 3 (1956) | 17 | 15 | 0 | 32 |
| Up | Up | 13 | 21 | — | 34 |
| | Class 1 (1952→1958) | 12 | 20 | — | 32 |
| | Special: Class 2 | 1 | 1 | — | 2 |
| Incumbent retired | Incumbent retired | 0 | 6 | — | 6 |
| | Held by same party | 0 | 3 | — | 3 |
| | Replaced by other party | 3 Republicans replaced by 3 Democrats | 3 Republicans replaced by 3 Democrats | — | 3 |
| | Result | 3 | 3 | 0 | 6 |
| Incumbent ran | Incumbent ran | 13 | 15 | — | 28 |
| | Won re-election | 13 | 5 | — | 18 |
| | Lost re-election | 10 Republicans replaced by 10 Democrats | 10 Republicans replaced by 10 Democrats | — | 10 |
| | Lost renomination, but held by same party | 0 | 0 | — | 0 |
| | Result | 23 | 5 | 0 | 28 |
| New state | New state | 2 | 0 | 0 | 2 |
| Total elected | Total elected | 28 | 8 | 0 | 36 |
| Net gain/loss | Net gain/loss | 15 | 13 | | 15 |
| Nationwide vote | Nationwide vote | 21,426,124 | 16,622,338 | 678,147 | 38,726,609 |
| | Share | 55.33% | 42.92% | 1.75% | 100% |
| Result | Result | 64 | 34 | 0 | 98 |
Source: Clerk of the U.S. House of Representatives

## Gains, losses, and holds
### Retirements

Six Republicans retired instead of seeking re-election.
| State | Senator | Replaced by |
| California | William Knowland | Clair Engle |
| Indiana | William E. Jenner | Vance Hartke |
| New Jersey | H. Alexander Smith | Harrison A. Williams |
| New York | Irving Ives | Kenneth Keating |
| Pennsylvania | Edward Martin | Hugh Scott |
| Vermont | Ralph Flanders | Winston L. Prouty |

### Defeats

Ten Republicans sought re-election but lost in the general election.
| State | Senator | Replaced by |
| Connecticut | William A. Purtell | Thomas J. Dodd |
| Maine | Frederick G. Payne | Edmund Muskie |
| Michigan | Charles E. Potter | Philip Hart |
| Minnesota | Edward J. Thye | Eugene McCarthy |
| Nevada | George W. Malone | Howard Cannon |
| Ohio | John W. Bricker | Stephen M. Young |
| Utah | Arthur V. Watkins | Frank Moss |
| West Virginia (regular) | Chapman Revercomb | Robert Byrd |
| West Virginia (special) | John D. Hoblitzell Jr. | Jennings Randolph |
| Wyoming | Frank A. Barrett | Gale W. McGee |

### New states

Alaska was admitted into the Union and elected two Democrats to the Senate.
| State | Senator |
| Alaska (class 2) | Bob Bartlett |
| Alaska (class 3) | Ernest Gruening |

### Post-election states

Hawaii was admitted into the Union and elected one Democrat and one Republican to the Senate on July 28, 1959.
| State | Senator |
| Hawaii (class 1) | Hiram Fong |
| Hawaii (class 3) | Oren E. Long |

### Post election changes

Two Democrats left the Senate after the election. Both seats were filled by Democrats.
| State | Senator | Replaced by |
| Oregon | Richard L. Neuberger | Hall S. Lusk |
| Missouri | Thomas C. Hennings Jr. | Edward V. Long |

## Change in composition
### Before the elections

| | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ | D$_7$ | D$_8$ | D$_9$ |
| D$_{19}$ | D$_{18}$ | D$_{17}$ | D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ |
| D$_{20}$ | D$_{21}$ | D$_{22}$ | D$_{23}$ | D$_{24}$ | D$_{25}$ | D$_{27}$ | D$_{26}$ | D$_{28}$ | D$_{29}$ |
| D$_{39}$ Miss. Ran | D$_{38}$ Mass. Ran | D$_{37}$ Fla. Ran | D$_{36}$ | D$_{35}$ | D$_{34}$ | D$_{33}$ | D$_{32}$ | D$_{31}$ | D$_{30}$ |
| D$_{40}$ Mo. Ran | D$_{41}$ Mont. Ran | D$_{42}$ N.M. Ran | D$_{43}$ N.C. (sp) Ran | D$_{44}$ R.I. Ran | D$_{45}$ Tenn. Ran | D$_{46}$ Texas Ran | D$_{47}$ Va. Ran | D$_{48}$ Wash. Ran | D$_{49}$ Wis. Ran |
| Majority ↑ | Majority ↑ | Majority ↑ | Majority ↑ | Majority ↑ | Majority ↑ | Majority ↑ | Majority ↑ | Majority ↑ | TBD$_1$ Ak. (cl. 3) New state |
| R$_{40}$ N.D. Ran | R$_{41}$ Ohio Ran | R$_{42}$ Pa. Retired | R$_{43}$ Utah Ran | R$_{44}$ Vt. Retired | R$_{45}$ W.Va. (reg) Ran | R$_{46}$ W.Va. (sp) Ran | R$_{47}$ Wyo. Ran | TBD$_2$ Ak. (cl. 2) New state | TBD$_1$ Ak. (cl. 3) New state |
| R$_{39}$ N.Y. Retired | R$_{38}$ N.J. Retired | R$_{37}$ Nev. Ran | R$_{36}$ Neb. Ran | R$_{35}$ Minn. Ran | R$_{34}$ Mich. Ran | R$_{33}$ Md. Ran | R$_{32}$ Maine Ran | R$_{31}$ Ind. Retired | R$_{30}$ Del. Ran |
| R$_{20}$ | R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ | R$_{25}$ | R$_{26}$ | R$_{27}$ Ariz. Ran | R$_{28}$ Calif. Retired | R$_{29}$ Conn. Ran |
| R$_{19}$ | R$_{18}$ | R$_{17}$ | R$_{16}$ | R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ |
| | R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ | R$_6$ | R$_7$ | R$_8$ | R$_9$ |

### After the elections

| | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ | D$_7$ | D$_8$ | D$_9$ |
| D$_{19}$ | D$_{18}$ | D$_{17}$ | D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ |
| D$_{20}$ | D$_{21}$ | D$_{22}$ | D$_{23}$ | D$_{24}$ | D$_{25}$ | D$_{26}$ | D$_{27}$ | D$_{28}$ | D$_{29}$ |
| D$_{39}$ Miss. Re-elected | D$_{38}$ Mass. Re-elected | D$_{37}$ Fla. Re-elected | D$_{36}$ | D$_{35}$ | D$_{34}$ | D$_{33}$ | D$_{32}$ | D$_{31}$ | D$_{30}$ |
| D$_{40}$ Mo. Re-elected | D$_{41}$ Mont. Re-elected | D$_{42}$ N.M. Re-elected | D$_{43}$ N.C. (sp) Elected | D$_{44}$ R.I. Re-elected | D$_{45}$ Tenn. Re-elected | D$_{46}$ Texas Re-elected | D$_{47}$ Va. Re-elected | D$_{48}$ Wash. Re-elected | D$_{49}$ Wis. Re-elected |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | D$_{50}$ Ak. (cl. 2) Gain |
| D$_{59}$ N.J. Gain | D$_{58}$ Nev. Gain | D$_{57}$ Minn. Gain | D$_{56}$ Mich. Gain | D$_{55}$ Maine Gain | D$_{54}$ Ind. Gain | D$_{53}$ Conn. Gain | D$_{52}$ Calif. Gain | D$_{51}$ Ak. (cl. 3) Gain | D$_{50}$ Ak. (cl. 2) Gain |
| D$_{60}$ Ohio Gain | D$_{61}$ Utah Gain | D$_{62}$ W.Va. (reg) Gain | D$_{63}$ W.Va. (sp) Gain | D$_{64}$ Wyo. Gain | R$_{34}$ Vt. Hold | R$_{33}$ Pa. Hold | R$_{32}$ N.D. Re-elected | R$_{31}$ N.Y. Hold | R$_{30}$ Neb. Re-elected |
| R$_{20}$ | R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ | R$_{25}$ | R$_{26}$ | R$_{27}$ Ariz. Re-elected | R$_{28}$ Del. Re-elected | R$_{29}$ Md. Re-elected |
| R$_{19}$ | R$_{18}$ | R$_{17}$ | R$_{16}$ | R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ |
| | R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ | R$_6$ | R$_7$ | R$_8$ | R$_9$ |
| Key: | D$_#$ Democratic R$_#$ Republican |

## Race summaries
### Special / new state elections

In the special elections, the winners were seated during 1958 or before January 3, 1959. In the new state elections, the winners were seated with the new Congress on January 3, 1959. Ordered by election date.
| State | Incumbent | Incumbent | Incumbent | Results | Candidates |
| State | Senator | Party | Electoral history | Results | Candidates |
| North Carolina (class 2) | B. Everett Jordan | Democratic | 1958 (Appointed) | Interim appointee elected November 4, 1958. | ▌Y B. Everett Jordan (Democratic) 70.0% ▌Richard C. Clarke, Jr. (Republican) 30.0% |
| West Virginia (class 2) | John D. Hoblitzell, Jr. | Republican | 1958 (Appointed) | Interim appointee lost election. New senator elected November 4, 1958. Democratic gain. | ▌Y Jennings Randolph (Democratic) 59.3% ▌John D. Hoblitzell, Jr. (Republican) 40.7% |
| Alaska (class 2) | Alaska admitted as a state January 3, 1959. | Alaska admitted as a state January 3, 1959. | Alaska admitted as a state January 3, 1959. | New state. New senator elected November 25, 1958. Democratic gain. | ▌Y Bob Bartlett (Democratic) 83.8% ▌R. E. Robertson (Republican) 15.0% ▌Keith Capper (write-in) 1.2% |
| Alaska (class 3) | Alaska admitted as a state January 3, 1959. | Alaska admitted as a state January 3, 1959. | Alaska admitted as a state January 3, 1959. | New state. New senator elected November 25, 1958. Democratic gain. | ▌Y Ernest Gruening (Democratic) 52.6% ▌Mike Stepovich (Republican) 47.4% |

### Elections leading to the next Congress

In these regular elections, the winners were elected for the term beginning January 3, 1959; ordered by state.
All of the elections involved the Class 1 seats.
| State | Incumbent | Incumbent | Incumbent | Results | Candidates |
| State | Senator | Party | Electoral history | Results | Candidates |
| Arizona | Barry Goldwater | Republican | 1952 | Incumbent re-elected. | ▌Y Barry Goldwater (Republican) 56.1% ▌Ernest McFarland (Democratic) 43.9% |
| California | William Knowland | Republican | 1945 (Appointed) 1946 (special) 1952 | Incumbent retired to run for California Governor. New senator elected. Democratic gain. | ▌Y Clair Engle (Democratic) 57.0% ▌Goodwin Knight (Republican) 42.9% |
| Connecticut | William A. Purtell | Republican | 1952 (Appointed) 1952 (Retired) 1952 | Incumbent lost re-election. New senator elected. Democratic gain. | ▌Y Thomas J. Dodd (Democratic) 57.3% ▌William A. Purtell (Republican) 42.4% ▌Vivien Kellems (write-in) 0.3% |
| Delaware | John J. Williams | Republican | 1946 1952 | Incumbent re-elected. | ▌Y John J. Williams (Republican) 53.3% ▌Elbert N. Carvel (Democratic) 46.7% |
| Florida | Spessard Holland | Democratic | 1946 (Appointed) 1946 1952 | Incumbent re-elected. | ▌Y Spessard Holland (Democratic) 71.2% ▌Leland Hyzer (Republican) 28.8% |
| Indiana | William E. Jenner | Republican | 1944 (special) 1946 1952 | Incumbent retired. New senator elected. Democratic gain. | ▌Y Vance Hartke (Democratic) 56.5% ▌Harold W. Handley (Republican) 42.4% ▌John Henry Stelle (Prohibition) 1.1% |
| Maine | Frederick G. Payne | Republican | 1952 | Incumbent lost re-election. New senator elected. Democratic gain. | ▌Y Edmund Muskie (Democratic) 60.8% ▌Frederick G. Payne (Republican) 39.2% |
| Maryland | J. Glenn Beall | Republican | 1952 | Incumbent re-elected. | ▌Y J. Glenn Beall (Republican) 51.0% ▌Thomas D'Alesandro Jr. (Democratic) 49.0% |
| Massachusetts | John F. Kennedy | Democratic | 1952 | Incumbent re-elected. | ▌Y John F. Kennedy (Democratic) 73.2% ▌Vincent J. Celeste (Republican) 26.2% |
| Michigan | Charles E. Potter | Republican | 1952 (special) 1952 | Incumbent lost re-election. New senator elected. Democratic gain. | ▌Y Philip Hart (Democratic) 53.6% ▌Charles E. Potter (Republican) 46.1% |
| Minnesota | Edward J. Thye | Republican | 1946 1952 | Incumbent lost re-election. New senator elected. Democratic–Farmer–Labor gain. | ▌Y Eugene McCarthy (DFL) 52.9% ▌Edward J. Thye (Republican) 46.6% ▌William M. Curran (Socialist Workers) 0.5% |
| Mississippi | John C. Stennis | Democratic | 1947 (special) 1952 | Incumbent re-elected. | ▌Y John C. Stennis (Democratic) Unopposed |
| Missouri | Stuart Symington | Democratic | 1952 | Incumbent re-elected. | ▌Y Stuart Symington (Democratic) 66.5% ▌Hazel Palmer (Republican) 33.6% |
| Montana | Mike Mansfield | Democratic | 1952 | Incumbent re-elected. | ▌Y Mike Mansfield (Democratic) 76.2% ▌Lou W. Welch (Republican) 23.8% |
| Nebraska | Roman Hruska | Republican | 1954 (special) | Incumbent re-elected. | ▌Y Roman Hruska (Republican) 55.6% ▌Frank B. Morrison (Democratic) 44.4% |
| Nevada | George W. Malone | Republican | 1946 1952 | Incumbent lost re-election. New senator elected. Democratic gain. | ▌Y Howard Cannon (Democratic) 57.7% ▌George W. Malone (Republican) 42.3% |
| New Jersey | Howard Alexander Smith | Republican | 1944 (special) 1946 1952 | Incumbent retired. New senator elected. Democratic gain. | ▌Y Harrison A. Williams (Democratic) 51.4% ▌Robert Kean (Republican) 46.9% |
| New Mexico | Dennis Chávez | Democratic | 1935 (Appointed) 1936 (special) 1940 1946 1952 | Incumbent re-elected. | ▌Y Dennis Chávez (Democratic) 62.7% ▌Forrest S. Atchley (Republican) 37.3% |
| New York | Irving Ives | Republican | 1946 1952 | Incumbent retired. New senator elected. Republican hold. | ▌Y Kenneth Keating (Republican) 50.8% ▌Frank Hogan (Democratic) 48.4% |
| North Dakota | William Langer | Republican | 1940 1946 1952 | Incumbent re-elected. | ▌Y William Langer (Republican) 57.2% ▌Raymond Vensdel (Democratic-NPL) 41.5% |
| Ohio | John W. Bricker | Republican | 1946 1952 | Incumbent lost re-election. New senator elected. Democratic gain. | ▌Y Stephen M. Young (Democratic) 52.5% ▌John W. Bricker (Republican) 47.5% |
| Pennsylvania | Edward Martin | Republican | 1946 1952 | Incumbent retired. New senator elected. Republican hold. | ▌Y Hugh Scott (Republican) 51.2% ▌George M. Leader (Democratic) 48.4% |
| Rhode Island | John Pastore | Democratic | 1950 (special) 1952 | Incumbent re-elected. | ▌Y John Pastore (Democratic) 64.5% ▌Bayard Ewing (Republican) 35.5% |
| Tennessee | Albert Gore Sr. | Democratic | 1952 | Incumbent re-elected. | ▌Y Albert Gore Sr. (Democratic) 79.0% ▌Hobart F. Atkins (Republican) 19.0% |
| Texas | Ralph Yarborough | Democratic | 1957 (special) | Incumbent re-elected. | ▌Y Ralph Yarborough (Democratic) 74.6% ▌Roy Whittenburg (Republican) 23.6% |
| Utah | Arthur V. Watkins | Republican | 1946 1952 | Incumbent lost re-election. New senator elected. Democratic gain. | ▌Y Frank Moss (Democratic) 38.7% ▌Arthur V. Watkins (Republican) 34.8% ▌J. Bracken Lee (Independent) 26.4% |
| Vermont | Ralph Flanders | Republican | 1946 (Appointed) 1946 (special) 1952 | Incumbent retired. New senator elected. Republican hold. | ▌Y Winston L. Prouty (Republican) 52.2% ▌Frederick J. Fayette (Democratic) 47.8% |
| Virginia | Harry F. Byrd | Democratic | 1933 (Appointed) 1933 (special) 1934 1940 1946 1952 | Incumbent re-elected. | ▌Y Harry F. Byrd (Democratic) 69.3% ▌Louise Wensel (Independent) 26.3% |
| Washington | Henry M. Jackson | Democratic | 1952 | Incumbent re-elected. | ▌Y Henry M. Jackson (Democratic) 67.3% ▌William B. Bantz (Republican) 31.4% |
| West Virginia | Chapman Revercomb | Republican | 1942 1948 (Lost) 1956 (special) | Incumbent lost re-election. New senator elected. Democratic gain. | ▌Y Robert Byrd (Democratic) 59.2% ▌Chapman Revercomb (Republican) 40.8% |
| Wisconsin | William Proxmire | Democratic | 1957 (special) | Incumbent re-elected. | ▌Y William Proxmire (Democratic) 57.1% ▌Roland J. Steinle (Republican) 42.7% |
| Wyoming | Frank A. Barrett | Republican | 1952 | Incumbent lost re-election. New senator elected. Democratic gain. | ▌Y Gale W. McGee (Democratic) 50.8% ▌Frank A. Barrett (Republican) 49.2% |

## Closest races

Eleven races had a margin of victory under 10%:
| State | Party of winner | Margin |
| Wyoming | Democratic (flip) | 1.6% |
| Maryland | Republican | 2.0% |
| New York | Republican | 2.4% |
| Utah | Democratic (flip) | 3.9% |
| Vermont | Republican | 4.4% |
| New Jersey | Democratic (flip) | 4.5% |
| Ohio | Democratic (flip) | 5.0% |
| Alaska (class 3) | Democratic (flip) | 5.2% |
| Minnesota | Democratic (flip) | 6.3% |
| Delaware | Republican | 6.6% |
| Michigan | Democratic (flip) | 7.5% |
Maine was the tipping point state with a margin of 21.6%.

## Alaska

Alaska would become a new state January 3, 1959, and it elected two initial senators November 25, 1958, in advance of statehood. The Democratic Party thereby picked up 2 more seats.
In their next elections, Alaska's senators would be elected to 6-year terms.
The class 2 race, for the 2-year term ending in 1961, was between the Democratic incumbent territorial delegate Bob Bartlett, and the Republican Juneau attorney R. E. Robertson.
Alaska regular election (class 2) :
| Party | Party | Candidate | Votes | % |
| | Democratic | Bob Bartlett | 40,939 | 83.83 |
| | Republican | R. E. Robertson | 7,299 | 14.95 |
| | Write-In | Keith Capper | 599 | 1.23 |
| Majority | Majority | Majority | 33,640 | 68.88 |
| Turnout | Turnout | Turnout | 48,837 | |
| | Democratic win (new seat) | Democratic win (new seat) | Democratic win (new seat) | Democratic win (new seat) |
Bartlett would be re-elected twice and serve until his death in 1968.
The class 3 race, for the 4-year term ending in 1963, pitted two former territorial governors, Democrat Ernest Gruening against Republican Mike Stepovich. Gruening won a close race.
Alaska regular election (class 3) :
| Party | Party | Candidate | Votes | % |
| | Democratic | Ernest Gruening | 26,045 | 52.61 |
| | Republican | Mike Stepovich | 23,464 | 47.39 |
| Majority | Majority | Majority | 2,581 | 5.22 |
| Turnout | Turnout | Turnout | 49,509 | |
| | Democratic win (new seat) | Democratic win (new seat) | Democratic win (new seat) | Democratic win (new seat) |
Gruening would be re-elected in 1962 and serve until losing renomination in 1968.

## Arizona

Arizona general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Republican | Barry Goldwater (Incumbent) | 164,593 | 56.06% |
| | Democratic | Ernest W. McFarland | 129,030 | 43.94% |
| Majority | Majority | Majority | 35,563 | 12.12% |
| Turnout | Turnout | Turnout | 293,623 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## California

California general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Clair Engle | 2,927,693 | 57.01 |
| | Republican | Goodwin Knight | 2,204,337 | 42.93 |
| | Write-In | Jesse M. Ritchie | 892 | 0.02 |
| | Write-In | Ray B. Pollard | 281 | 0.01 |
| | None | Scattering | 2,018 | 0.04 |
| Majority | Majority | Majority | 723,356 | 14.08 |
| Turnout | Turnout | Turnout | 5,135,221 | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## Connecticut

In Connecticut, Democrat Thomas J. Dodd defeated incumbent senator William A. Purtell who ran for a second term.
Connecticut general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Thomas J. Dodd | 554,841 | 57.28 |
| | Republican | William A. Purtell (Incumbent) | 410,622 | 42.39 |
| | Independent | Vivien Kellems | 3,043 | 0.31 |
| | None | Scattering | 119 | 0.01 |
| Majority | Majority | Majority | 144,219 | 14.89 |
| Turnout | Turnout | Turnout | 968,625 | |
| | Swing to Democratic from Republican | Swing | | |

## Delaware

Two-term Republican John J. Williams was re-elected to a third term.
Delaware general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Republican | John J. Williams (Incumbent) | 82,280 | 53.28 |
| | Democratic | Elbert Carvel | 72,152 | 46.72 |
| Majority | Majority | Majority | 10,128 | 6.56 |
| Turnout | Turnout | Turnout | 154,432 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |
Williams would be re-elected in 1964, serving four terms until his 1970 retirement.

## Florida

Incumbent Democrat Senator Holland, a conservative, was challenged by former senator Claude Pepper, who had been unseated in 1950. Holland had played a role in recruiting George A. Smathers to run against the liberal Pepper in that election. The two served as colleagues in the Senate from 1947 to 1951.
Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Spessard L. Holland (Incumbent) | 408,084 | 55.94 |
| | Democratic | Claude Pepper | 321,377 | 44.06 |
| Total votes | Total votes | Total votes | 729,461 | 100.00 |
General election results :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Spessard Holland (Incumbent) | 386,113 | 71.23 | 28.59 |
| | Republican | Leland Hyzer | 155,956 | 28.77 | 28.77 |
| Majority | Majority | Majority | 230,157 | 42.46 |
| Turnout | Turnout | Turnout | 542,069 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Indiana

Incumbent Republican William E. Jenner did not seek a second full term in office and was replaced by Democrat Vance Hartke, the mayor of Evansville. Hartke defeated incumbent Republican Governor of Indiana Harold W. Handley.
Jenner resigned shortly before the election and urged Handley, Jenner's political protégé, to seek his seat. A plan was proposed whereby Handley would resign the governorship, his lieutenant would appoint him senator, and he would finish the term and run as an incumbent. When the plan was revealed to the party leadership, they strongly advised him to not implement it because they feared it would hurt the party and be perceived as a scandal.
Handley did not resign from the governorship during his campaign and was widely criticized for the unprecedented action. Hartke accused Handley of raising taxes, breaking of his campaign promise, his reluctance in supporting right-to-work, and rising state unemployment. Statewide unemployment was just above 10% in April, but dropped to 6.9% by the end of September.
Indiana general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Vance Hartke | 973,636 | 56.47 |
| | Republican | Harold W. Handley | 731,635 | 42.43 |
| | Prohibition | John Stelle | 19,040 | 1.10 |
| Majority | Majority | Majority | 242,001 | 14.04 |
| Turnout | Turnout | Turnout | 1,724,311 | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## Maine

Maine held its election September 8, 1958, in keeping with its routine practice of holding elections before the November national Election Day. Democrat Edmund Muskie defeated one-term Republican incumbent, Frederick G. Payne by a wide margin, 61–39%.
Maine general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edmund Muskie | 172,704 | 60.76% |
| | Republican | Frederick G. Payne (Incumbent) | 111,522 | 39.24% |
| Majority | Majority | Majority | 61,182 | 21.52% |
| Turnout | Turnout | Turnout | 284,226 | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## Maryland

Maryland general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Republican | J. Glenn Beall (Incumbent) | 384,931 | 51.18% |
| | Democratic | Thomas D'Alesandro Jr. | 367,142 | 48.82% |
| Majority | Majority | Majority | 17,789 | 3.36% |
| Turnout | Turnout | Turnout | 752,073 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Massachusetts

Massachusetts general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Democratic | John F. Kennedy (Incumbent) | 1,362,926 | 73.20% |
| | Republican | Vincent J. Celeste | 488,318 | 26.22% |
| | Socialist Labor | Lawrence Gilfedder | 5,457 | 0.29% |
| | Prohibition | Mark R. Shaw | 5,335 | 0.29% |
| | None | Scattering | 5 | 0.00% |
| Majority | Majority | Majority | 874,608 | 46.98% |
| Turnout | Turnout | Turnout | 1,862,041 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Michigan

Michigan general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Philip A. Hart | 1,216,966 | 53.57% |
| | Republican | Charles E. Potter (Incumbent) | 1,046,963 | 46.09% |
| | Prohibition | Elmer H. Ormiston | 3,518 | 0.15% |
| | Socialist Labor | James Sim | 3,128 | 0.14% |
| | Socialist Workers | Evelyn Sell | 1,068 | 0.05% |
| | None | Scattering | 1 | 0.00% |
| Majority | Majority | Majority | 170,003 | 7.48% |
| Turnout | Turnout | Turnout | 2,271,644 | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## Minnesota

In Minnesota, Democratic Representative Eugene McCarthy defeated incumbent senator Edward John Thye who ran for a third term.
Democratic primary election :
| Party | Party | Candidate | Votes | % |
| | Democratic (DFL) | Eugene J. McCarthy | 279,796 | 75.65% |
| | Democratic (DFL) | Hjalmar Petersen | 76,340 | 20.64% |
| | Democratic (DFL) | Hans R. Miller | 13,736 | 3.71% |
| Total votes | Total votes | Total votes | 369,872 | 100.00% |
Republican primary election :
| Party | Party | Candidate | Votes | % |
| | Republican | Edward John Thye (Incumbent) | 224,833 | 91.81% |
| | Republican | Edward C. Slettedahl | 13,734 | 5.61% |
| | Republican | Mrs. Peder P. Schmidt | 6,332 | 2.58% |
| Total votes | Total votes | Total votes | 244,899 | 100.00% |
General election :
| Party | Party | Candidate | Votes | % |
| | Democratic (DFL) | Eugene J. McCarthy | 608,847 | 52.95% |
| | Republican | Edward John Thye (Incumbent) | 535,629 | 46.58% |
| | Socialist Workers | William M. Curran | 5,407 | 0.47% |
| Total votes | Total votes | Total votes | 1,149,883 | 100.00% |
| Majority | Majority | Majority | 73,218 | 6.37% |
| | Democratic (DFL) gain from Republican | Democratic (DFL) gain from Republican | Democratic (DFL) gain from Republican | Democratic (DFL) gain from Republican |

## Mississippi

Two-term Democrat John C. Stennis was re-elected with no opposition.
Mississippi general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Democratic | John C. Stennis (Incumbent) | 61,039 | 100.00% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |
Stennis would be re-elected four more times, serving until his retirement in 1989.

## Missouri

Incumbent Democrat Stuart Symington was re-elected to a second term. Hazel Palmer was the first woman ever nominated for United States senator in Missouri.
Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Stuart Symington (incumbent) | 365,470 | 92.13% |
| | Democratic | Lawrence Hastings | 19,954 | 5.03% |
| | Democratic | Lamar Dye | 11,262 | 2.84% |
| Total votes | Total votes | Total votes | 396,686 | 100.00% |
Republican primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Hazel Palmer | 61,481 | 44.63% |
| | Republican | William McKinley Thomas | 36,438 | 26.45% |
| | Republican | Homer Cotton | 27,023 | 19.62% |
| | Republican | Herman G. Grosby | 12,818 | 9.31% |
| Total votes | Total votes | Total votes | 137,760 | 100.00% |
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Stuart Symington (Incumbent) | 780,083 | 66.45% | 12.46 |
| | Republican | Hazel Palmer | 393,847 | 33.55% | 12.39 |
| Majority | Majority | Majority | 386,236 | 32.90% | |
| Turnout | Turnout | Turnout | 1,173,930 | | |
| | Democratic hold | Democratic hold | Swing | | |

## Montana

Incumbent Mike Mansfield, who was first elected to the Senate in 1952, ran for re-election. Mansfield won the Democratic primary comfortably, and moved on to the general election, where he was opposed by Lou W. Welch, a millworker and the Republican nominee. In contrast to the close campaign in 1952, Mansfield defeated Welch in a landslide and won his second term in the Senate easily.
Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mike Mansfield (Incumbent) | 97,207 | 91.72% |
| | Democratic | J. M. Nickey | 4,710 | 4.44% |
| | Democratic | Thomas G. Stimatz, former State Representative | 4,061 | 3.83% |
| Total votes | Total votes | Total votes | 105,978 | 100.00% |
Republican Primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Lou W. Welch, millworker | 19,860 | 50.30% |
| | Republican | Blanche Anderson | 19,624 | 49.70% |
| Total votes | Total votes | Total votes | 39,484 | 100.00% |
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Mike Mansfield (Incumbent) | 174,910 | 76.22% | 25.47% |
| | Republican | Lou W. Welch | 54,573 | 23.78% | 24.77% |
| Majority | Majority | Majority | 120,337 | 52.44% | 50.25% |
| Turnout | Turnout | Turnout | 229,483 | | |
| | Democratic hold | Democratic hold | Swing | | |

## Nebraska

Republican Roman Hruska had won a 1954 special election and ran for a full term. He beat Democratic attorney Frank B. Morrison, who had previously lost his challenger bid for Nebraska's 1st congressional district.
Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Frank B. Morrison | 35,482 | 51.85 |
| | Democratic | Eugene D. O'Sullivan | 26,436 | 38.63 |
| | Democratic | Mike F. Kracher | 6,500 | 9.50 |
| | Democratic | Scattering | 13 | 0.02 |
| Total votes | Total votes | Total votes | 68,431 | 100 |
Republican primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Roman Hruska (Incumbent) | 103,348 | 99.95 |
| | Republican | Scattering | 51 | 0.05 |
| Total votes | Total votes | Total votes | 103,399 | 100 |
Nebraska general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Republican | Roman Hruska (Incumbent) | 232,227 | 55.64% |
| | Democratic | Frank B. Morrison | 185,152 | 44.36% |
| | N/A | Scattering | 6 | 0.00% |
| Majority | Majority | Majority | 47,075 | 11.18% |
| Turnout | Turnout | Turnout | 417,385 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |
Hruska would be re-elected two more times and serve until his 1976 retirement.
Morrison would be elected Governor of Nebraska in 1960 and serve there for six years from 1961 to 1967, and was re-elected twice while running unsuccessfully for U.S. senator.

## Nevada

In Nevada, incumbent Republican George W. Malone ran for re-election to a third term, but was defeated by Democrat Howard Cannon.
The campaign was considered one of the most competitive and highly watched in the nation in 1958. Senator Malone was known nationally as a leader within the Republican Party's right wing and held key appointments on the Senate Finance and Interior Committees.
Malone campaigned on his experience and seniority in the Senate, using the slogan "He Knows Nevada Best." He received support from Eisenhower cabinet secretaries Fred Seaton and Ezra Taft Benson. Benson, one of the Twelve Apostles of the Church of Jesus Christ of Latter-Day Saints, was especially influential among Nevada's large Mormon population. His endorsement was seen as particularly important in light of Cannon's Mormon faith. Late in the campaign, Malone published full-page ads touting his effort to save Nevada from a federal gambling tax.
Cannon focused his attacks on Malone's absentee record in the Senate and his reputation on Capitol Hill as an unpopular extremist.
Cannon won the election by a safe margin owing to his overwhelming support in his native Clark County, which contained 47 percent of the state's registered voters. He was the first candidate from southern Nevada elected to the United States Senate.
Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Howard Cannon | 22,787 | 51.66% |
| | Democratic | Fred Anderson | 21,319 | 48.34% |
| Total votes | Total votes | Total votes | 44,106 | {{{percentage}}} |
Senator Malone was unopposed for re-nomination by the Republican Party.
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Howard Cannon, City Attorney of Las Vegas | 48,732 | 57.65% | 7.63% |
| | Republican | George W. Malone (Incumbent) | 35,760 | 42.32% | 9.35% |
| Majority | Majority | Majority | 12,972 | 15.35% | 12.00% |
| Turnout | Turnout | Turnout | 84,492 | | |
| | Democratic gain from Republican | Democratic gain from Republican | Swing | | |

## New Jersey

Incumbent Republican H. Alexander Smith chose not to seek a third term in office. Democratic U.S. Representative Harrison Williams won the open seat over U.S. Representative Robert Kean.
Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Harrison A. Williams | 152,413 | 43.12% |
| | Democratic | John Grogan | 139,605 | 39.49% |
| | Democratic | Joseph E. McLean | 61,478 | 17.39% |
| Total votes | Total votes | Total votes | 353,496 | 100.00% |
Republican primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Robert Kean | 152,884 | 43.00% |
| | Republican | Bernard M. Shanley | 128,990 | 36.28% |
| | Republican | Robert J. Morris | 73,658 | 20.72% |
| Total votes | Total votes | Total votes | 355,532 | 100.00% |
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Harrison A. Williams | 966,832 | 51.39% | 7.77 |
| | Republican | Robert Kean | 882,287 | 46.90% | 8.61 |
| | Socialist Workers | Daniel Roberts | 11,669 | 0.62% | 0.40 |
| | Politicians Are Jokers | Henry Krajewski | 6,013 | 0.32% | N/A |
| | Independent | John J. Winberry | 5,481 | 0.29% | N/A |
| | Conservative | Winifred O. Perry | 3,062 | 0.16% | N/A |
| | People's Choice | John M. D'Addetta | 3,024 | 0.16% | N/A |
| | Socialist Labor | Albert Ronis | 2,935 | 0.16% | 0.09 |
| Total votes | Total votes | Total votes | 1,881,303 | 100.00% |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## New Mexico

New Mexico general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Dennis Chavez (Incumbent) | 127,496 | 62.71% |
| | Republican | Forrest S. Atchley | 75,827 | 37.29% |
| Majority | Majority | Majority | 51,669 | 25.42% |
| Turnout | Turnout | Turnout | 203,323 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## New York

Incumbent Republican Irving Ives retired. Republican Representative Kenneth Keating defeated Democrat Frank Hogan to succeed Ives.
1958 Democratic Convention :
| Party | Party | Candidate | Votes | % |
| | Democratic | Frank Hogan | 772 | 67.60% |
| | Democratic | Thomas E. Murray Sr. | 304 | 26.62% |
| | Democratic | Thomas K. Finletter | 66 | 5.78% |
| Total votes | Total votes | Total votes | 1,317 | 100.00% |
General election :
| Party | Party | Candidate | Votes | % |
| | Republican | Kenneth Keating | 2,842,942 | 50.75% |
| | Democratic | Frank Hogan | 2,709,950 | 48.37% |
| | Independent Socialist | Corliss Lamont | 49,087 | 0.88% |
| | None | Scattering | 95 | 0.00% |
| Majority | Majority | Majority | 132,992 | 2.38% |
| Turnout | Turnout | Turnout | 5,601,979 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## North Carolina (special)

Democrat W. Kerr Scott had died April 16, 1958, and former Democratic Governor of North Carolina B. Everett Jordan was appointed April 19, 1958, to continue the term, pending a special election. Jordan was then re-elected in November.
General election :
| Party | Party | Candidate | Votes | % |
| | Democratic | B. Everett Jordan (incumbent) | 431,492 | 70.0% |
| | Republican | Richard C. Clarke Jr. | 184,977 | 30.0% |
| Turnout | Turnout | Turnout | | 15.18% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |
Jordan would later be twice re-elected and serve until 1973.

## North Dakota

Incumbent Republican, and former Non-Partisan League (NPL) senator, William Langer, was re-elected to a fourth term, defeating North Dakota Democratic NPL Party (Dem-NPL) candidate Raymond G. Vendsel.
Only Langer filed as a Republican, and the endorsed Democratic-NPL candidate was Raymond G. Vendsel. Langer and Vendsel won the primary elections for their respective parties.
Two independent candidates, Arthur C. Townley and Custer Solem, also filed before the deadline but had minimal impact on the outcome of the election, totaling less than 3,000 votes combined. Townley was known as the creator of the National Non-Partisan League, and had previously sought North Dakota's other senate seat in 1956.
North Dakota election :
| Party | Party | Candidate | Votes | % |
| | Republican | William Langer (Incumbent) | 117,070 | 57.21% |
| | Democratic–NPL | Raymond G. Vendsel | 84,892 | 41.49% |
| | Independent | Arthur C. Townley | 1,700 | 0.83% |
| | Independent | Custer Solem | 973 | 0.48% |
| Majority | Majority | Majority | 32,178 | 15.72% |
| Turnout | Turnout | Turnout | 204,635 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |
Langer would die in office less than a year into what became his final term. A special election was held in 1960 triggered by Langer's death.

## Ohio

Incumbent Republican John W. Bricker was defeated in his bid for a third term by U.S. Representative Stephen M. Young.
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Stephen M. Young | 1,652,211 | 52.46% | 7.04 |
| | Republican | John W. Bricker (Incumbent) | 1,497,199 | 47.54% | 7.05 |
| Majority | Majority | Majority | 155,012 | 4.92% |
| Turnout | Turnout | Turnout | 3,149,410 | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## Pennsylvania

Incumbent Republican Edward Martin did not seek re-election. The Republican nominee, Hugh Scott, defeated the term-limited Democratic Governor of Pennsylvania George M. Leader for the vacant seat.
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Republican | Hugh Scott | 2,042,586 | 51.21% | 0.37% |
| | Democratic | George M. Leader | 1,929,821 | 48.38% | 0.40% |
| | Socialist Labor | George S. Taylor | 10,431 | 0.26% | 0.26% |
| | Socialist Workers | Ethel Peterson | 5,742 | 0.14% | 0.14% |
| | N/A | Other | 42 | 0.00% | N/A |
| Majority | Majority | Majority | 112,765 | 2.83% | |
| Turnout | Turnout | Turnout | 3,988,622 | | |
| | Republican hold | Republican hold | Swing | | |
Scott would be twice re-elected, rising to the Senate Minority leader, and serve until retiring in 1977. Leader retired from public service after the defeat.

## Rhode Island

Two-term incumbent Democrat John Pastore was easily re-elected over Republican attorney Bayard Ewing, a repeat of their 1952 race.
Rhode Island general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Democratic | John Pastore (Incumbent) | 222,166 | 64.49% |
| | Republican | Bayard Ewing | 122,353 | 35.51% |
| Majority | Majority | Majority | 99,813 | 28.98% |
| Turnout | Turnout | Turnout | 344,519 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |
Ewing would later serve as the national chairman of the United Way (1969–1972) and the Rhode Island School of Design (1967–1985).

## Tennessee

Tennessee general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Albert Gore Sr. (Incumbent) | 317,324 | 79.00% |
| | Republican | Hobart F. Atkins | 76,371 | 19.01% |
| | Write-In | Chester W. Mason | 5,324 | 1.33% |
| | Write-In | Thomas Gouge Jr. | 2,646 | 0.66% |
| Majority | Majority | Majority | 240,953 | 59.99% |
| Turnout | Turnout | Turnout | 401,665 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Texas

Texas general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Ralph Yarborough (Incumbent) | 587,030 | 74.58% |
| | Republican | Roy Whittenburg | 185,926 | 23.62% |
| | Write-In | Bard W. Logan | 14,172 | 1.80% |
| Majority | Majority | Majority | 401,104 | 50.96% |
| Turnout | Turnout | Turnout | 787,128 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Utah

Utah general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Frank Moss | 112,827 | 38.73% |
| | Republican | Arthur V. Watkins (Incumbent) | 101,471 | 34.83% |
| | Independent | J. Bracken Lee | 77,013 | 26.44% |
| Majority | Majority | Majority | 11,356 | 3.90% |
| Turnout | Turnout | Turnout | 291,311 | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## Vermont

Incumbent Republican Ralph Flanders did not run for re-election to another term in the United States Senate. Republican candidate Winston L. Prouty defeated Democratic candidate Frederick J. Fayette to succeed him.
Republican primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Winston L. Prouty | 31,866 | 64.6% |
| | Republican | Lee E. Emerson | 17,468 | 35.4% |
| | Republican | Other | 4 | 0.0% |
| Total votes | Total votes | Total votes | 49,338 | 100.00% |
Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Frederick J. Fayette | 6,546 | 99.5% |
| | Democratic | Other | 32 | 0.5% |
| Total votes | Total votes | Total votes | 6,578 | 100.00% |
General election :
| Party | Party | Candidate | Votes | % |
| | Republican | Winston L. Prouty | 64,900 | 52.15% |
| | Democratic | Frederick J. Fayette | 59,536 | 47.84% |
| | N/A | Other | 6 | 0.00% |
| Majority | Majority | Majority | 5,364 | 4.31% |
| Total votes | Total votes | Total votes | 124,442 | 100.00% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Virginia

Incumbent Harry F. Byrd Sr. was re-elected after defeating Independent Louise Wensel and Social Democrat Clarke Robb.
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Harry F. Byrd (Incumbent) | 317,221 | 69.32% | 4.03% |
| | Independent | Louise Wensel | 120,224 | 26.27% | 26.27% |
| | Social Democratic | Clarke T. Robb | 20,154 | 4.40% | 7.98% |
| | Write-in | write-ins | 41 | 0.01% | 1.54% |
| Majority | Majority | Majority | 196,997 | 43.05% | |
| Turnout | Turnout | Turnout | 457,640 | | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Washington

Washington general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Henry M. Jackson (Incumbent) | 597,040 | 67.32% |
| | Republican | William B. Bantz | 278,271 | 31.38% |
| | Socialist Labor | Henry Killman | 7,592 | 0.86% |
| | Constitution | Archie G. Idso | 2,257 | 0.25% |
| | United Liberals and Socialists | Jay G. Sykes | 1,662 | 0.19% |
| Majority | Majority | Majority | 318,769 | 35.94% |
| Turnout | Turnout | Turnout | 886,822 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## West Virginia
### West Virginia (regular)

In 1956, senator Harley M. Kilgore died, and former senator William Revercomb won his seat in the 1956 special election. Revercomb sought re-election to a third term, but was defeated by Congressman Robert Byrd. This election was the beginning of Byrd's lifelong career in the Senate.
1958 United States Senate election in West Virginia :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Robert Byrd | 381,745 | 59.19% | +18.39% |
| | Republican | William Revercomb (Incumbent) | 263,172 | 40.81% | −18.39% |
| Total votes | Total votes | Total votes | 644,917 | 100.00% | -21.5% |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### West Virginia (special)

Incumbent Democrat Matthew M. Neely died of cancer January 8, 1958, and Republican John D. Hoblitzell Jr. was appointed January 25, 1958, to continue the term, pending a special election.
Former Democratic congressman Jennings Randolph was elected to finish the term that would run through 1961.
West Virginia special election :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jennings Randolph | 374,167 | 59.32% |
| | Republican | John D. Hoblitzell Jr. (Incumbent) | 256,510 | 39.77% |
| Total votes | Total votes | Total votes | 630,677 | 100% |
Randolph would be re-elected four times and serve until his retirement in 1985. Hoblitzell resumed his business interests and died January 6, 1962.

## Wisconsin

Wisconsin general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Democratic | William Proxmire (Incumbent) | 682,440 | 57.12% |
| | Republican | Roland J. Steinle | 510,398 | 42.72% |
| | Socialist Workers | James E. Boulton | 1,226 | 0.10% |
| | Socialist Labor | Georgia Cozzini | 537 | 0.04% |
| | None | Scattering | 77 | 0.01% |
| Majority | Majority | Majority | 171,042 | 14.40% |
| Turnout | Turnout | Turnout | 1,194,678 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Wyoming

Wyoming general election 1958 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Gale McGee | 58,035 | 50.84% |
| | Republican | Frank A. Barrett (Incumbent) | 56,122 | 49.16% |
| Majority | Majority | Majority | 1,913 | 1.68% |
| Turnout | Turnout | Turnout | 114,157 | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |