# 1930 United States Senate elections

The 1930 United States Senate elections occurred in the middle of Republican President Herbert Hoover's term. The 32 seats of Class 2 were contested in regular elections, and special elections were held to fill vacancies. With the Great Depression beginning to take hold, Republican incumbents became unpopular, and Democrats picked up a net of eight seats, erasing the Republican gains from the previous election cycle, however, Republicans retained control of the chamber. This was the first of four consecutive Senate elections during the Depression in which Democrats made enormous gains, achieving a cumulative pick-up of 34 seats.
In Louisiana, Democratic senator-elect Huey Long chose not to take his Senate seat until January 25, 1932, so he could remain as Governor of Louisiana. The Republicans therefore retained the plurality of seats at the beginning of the next Congress (with Vice President Charles Curtis (R) able to cast tie-breaking votes, the Republicans would have majority control).

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

Four Republicans retired instead of seeking re-election. Two Republicans retired instead of seeking election to finish the unexpired term and instead of seeking election to full term. One Democrat retired instead of seeking election to a full term.
| State | Senator | Replaced by |
| Colorado | Lawrence C. Phipps | Edward P. Costigan |
| Maine | Arthur R. Gould | Wallace H. White |
| Massachusetts | Frederick H. Gillett | Marcus A. Coolidge |
| New Jersey | David Baird Jr. | Dwight Morrow |
| Tennessee (regular) | William E. Brock | Cordell Hull |
| West Virginia | Guy D. Goff | Matthew M. Neely |
| Wyoming | Patrick J. Sullivan | Robert D. Carey |

### Defeats

Seven Republicans and five Democrats sought re-election but lost in the primary or general election.
| State | Senator | Replaced by |
| Alabama | J. Thomas Heflin | John H. Bankhead II |
| Illinois | Charles S. Deneen | J. Hamilton Lewis |
| Iowa | Daniel F. Steck | L. J. Dickinson |
| Kansas (special) | Henry J. Allen | George McGill |
| Kentucky (special) | John M. Robsion | Ben M. Williamson |
| Kentucky | John M. Robsion | M. M. Logan |
| Louisiana | Joseph E. Ransdell | Huey Long |
| North Carolina | F. M. Simmons | Josiah Bailey |
| Oklahoma | William B. Pine | Thomas Gore |
| Ohio | Roscoe C. McCulloch | Robert J. Bulkley |
| Pennsylvania | Joseph R. Grundy | James J. Davis |
| South Carolina | Cole L. Blease | James F. Byrnes |
| South Dakota | William H. McMaster | William J. Bulow |

### Post-election changes

| State | Senator | Replaced by |
| New Jersey | Dwight Morrow | W. Warren Barbour |
| Arkansas | Thaddeus H. Caraway | Hattie Caraway |
| Georgia | William J. Harris | John S. Cohen |
| Georgia | John S. Cohen | Richard Russell Jr. |
| Vermont | Frank C. Partridge | Warren Austin |
| Missouri | Harry B. Hawes | Bennett Champ Clark |

## Change in composition
### Before the elections

| | | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ | D$_7$ | D$_8$ |
| D$_{18}$ | D$_{17}$ | D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ |
| D$_{19}$ | D$_{20}$ | D$_{21}$ | D$_{22}$ | D$_{23}$ | D$_{24}$ | D$_{25}$ | D$_{26}$ | D$_{27}$ Ala. Ran | D$_{28}$ Ark. Ran |
| D$_{37}$ Texas Ran | D$_{39}$ Tenn. (sp) RanTenn. (reg) Retired | D$_{36}$ S.C. Ran | D$_{35}$ N.C. Ran | D$_{34}$ N.M. Ran | D$_{33}$ Mont. Ran | D$_{32}$ Miss. Ran | D$_{31}$ La. Ran | D$_{30}$ Iowa Ran | D$_{29}$ Ga. Ran |
| D$_{38}$ Va. Ran | FL$_1$ | R$_{56}$ Wyo. (reg) Wyo. (sp) Retired | R$_{55}$ W.Va. Retired | R$_{54}$ S.D. Ran | R$_{53}$ R.I. Ran | R$_{52}$ Pa. (sp) Ran | R$_{51}$ Ore. Ran | R$_{50}$ Okla. Ran | R$_{49}$ Ohio (sp) Ran |
| R$_{49}$ Ohio (sp) Ran |||||||||
| R$_{39}$ Kan. Ran | R$_{40}$ Kan. (sp) Ran | R$_{41}$ Ky. Ky. (sp) Ran | R$_{42}$ Maine Retired | R$_{43}$ Mass. Retired | R$_{44}$ Mich. Ran | R$_{45}$ Minn. Ran | R$_{46}$ Neb. Ran | R$_{47}$ N.H. Ran | R$_{48}$ N.J. N.J. (sp) Retired |
| R$_{38}$ Ill. Ran | R$_{37}$ Idaho Ran | R$_{36}$ Del. (reg) Del. (sp) Ran | R$_{35}$ Colo. Retired | R$_{34}$ | R$_{33}$ | R$_{32}$ | R$_{31}$ | R$_{30}$ | R$_{29}$ |
| R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ | R$_{25}$ | R$_{26}$ | R$_{27}$ | R$_{28}$ |
| R$_{18}$ | R$_{17}$ | R$_{16}$ | R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ |
| | | R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ | R$_6$ | R$_7$ | R$_8$ |

### After the elections

| | | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ | D$_7$ | D$_8$ |
| D$_{18}$ | D$_{17}$ | D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ |
| D$_{19}$ | D$_{20}$ | D$_{21}$ | D$_{22}$ | D$_{23}$ | D$_{24}$ | D$_{25}$ | D$_{26}$ | D$_{27}$ Ala. Re-elected | D$_{28}$ Ark. Re-elected |
| D$_{38}$ Va. Re-elected | D$_{37}$ Texas Re-elected | D$_{36}$ Tenn. (sp) ElectedTenn. (reg) Hold | D$_{35}$ S.C. Hold | D$_{34}$ N.C. Hold | D$_{33}$ N.M. Re-elected | D$_{32}$ Mont. Re-elected | D$_{31}$ Miss. Re-elected | D$_{30}$ La. Hold | D$_{29}$ Ga. Re-elected |
| D$_{39}$ Colo. Gain | D$_{40}$ Ill. Gain | D$_{41}$ Kan. (sp) Gain | D$_{42}$ Ky. (reg) Ky. (sp) Gain | D$_{43}$ Mass. Gain | D$_{44}$ Ohio (sp) Gain | D$_{45}$ Okla. Gain | D$_{46}$ S.D. Gain | D$_{47}$ W.Va. Gain | FL$_1$ |
| Majority with Republican vice president ↓ ||||||||||
| R$_{39}$ Mich. Re-elected | R$_{40}$ Minn. Re-elected | R$_{41}$ Neb. Re-elected | R$_{42}$ N.H. Re-elected | R$_{43}$ N.J. (reg) N.J. (sp) Hold | R$_{44}$ Ore. Re-elected | R$_{45}$ Pa. (sp) Hold | R$_{46}$ R.I. Re-elected | R$_{47}$ Wyo. (reg) Wyo. (sp) Retired | R$_{48}$ Iowa Gain |
| R$_{38}$ Maine Hold | R$_{37}$ Kan. (reg) Re-elected | R$_{36}$ Idaho Re-elected | R$_{35}$ Del. (reg) Del. (sp) Elected | R$_{34}$ | R$_{33}$ | R$_{32}$ | R$_{31}$ | R$_{30}$ | R$_{29}$ |
| R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ | R$_{25}$ | R$_{26}$ | R$_{27}$ | R$_{28}$ |
| R$_{18}$ | R$_{17}$ | R$_{16}$ | R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ |
| | | R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ | R$_6$ | R$_7$ | R$_8$ |
| Key | D$_#$ Democratic FL$_#$ Farmer–Labor R$_#$ Republican |

## Race summary
### Special elections during the 71st Congress

In these special elections, the winner were seated during 1930; ordered by election date (then by state).
| State | Incumbent | Incumbent | Incumbent | Results | Candidates |
| State | Senator | Party | Electoral history | Results | Candidates |
| Delaware (Class 2) | Daniel O. Hastings | Republican | 1928 (Appointed) | Interim appointee elected November 4, 1930. Winner was also elected on the same ballot to the next term; see below. | ▌Y Daniel O. Hastings (Republican) 54.5% ▌Thomas F. Bayard Jr. (Democratic) 45.4% |
| Kansas (Class 3) | Henry J. Allen | Republican | 1929 (Appointed) | Interim appointee lost election. New senator elected November 4, 1930. Democratic gain. | ▌Y George McGill (Democratic) 50.0% ▌Henry J. Allen (Republican) 48.0% |
| Kentucky (Class 2) | John M. Robsion | Republican | 1930 (Appointed) | Interim appointee lost election. New senator elected November 4, 1930. Democratic gain. Winner was not elected to the next term; see below. | ▌Y Ben M. Williamson (Democratic) 52.3% ▌John M. Robsion (Republican) 47.7% |
| New Jersey (Class 2) | David Baird Jr. | Republican | 1929 (Appointed) | Interim appointee retired. New senator elected November 4, 1930. Republican hold. Winner also elected to the next term, see below. | ▌Y Dwight Morrow (Republican) 59.1% ▌Alexander Simpson (Democratic) 38.6% |
| Ohio (Class 3) | Roscoe C. McCulloch | Republican | 1929 (Appointed) | Interim appointee lost election. New senator elected November 4, 1930. Democratic gain. | ▌Y Robert J. Bulkley (Democratic) 54.8% ▌Roscoe C. McCulloch (Republican) 45.2% |
| Pennsylvania (Class 3) | Joseph R. Grundy | Republican | 1929 (Appointed) | Interim appointee lost nomination. New senator elected November 4, 1930. Republican hold. | ▌Y James J. Davis (Republican) 71.5% ▌Sedgwick Kistler (Democratic) 25.6% |
| Tennessee (Class 2) | William E. Brock | Democratic | 1929 (Appointed) | Interim appointee elected November 4, 1930. Winner was not elected to the next term; see below. | ▌Y William E. Brock (Democratic) 74.4% ▌F. Todd Meacham (Republican) 25.6% |
| Wyoming (Class 2) | Patrick J. Sullivan | Republican | 1929 (Appointed) | Interim appointee retired. New senator elected November 4, 1930. Republican hold. Winner also elected to the next term; see below. | ▌Y Robert D. Carey (Republican) 58.8% ▌Harry Schwartz (Democratic) 41.2% |

### Elections leading to the 72nd Congress

In these general elections, the winners were elected for the term beginning March 4, 1931; ordered by state.
All of the elections involved the Class 2 seats.
| State | Incumbent | Incumbent | Incumbent | Results | Candidates |
| State | Senator | Party | Electoral history | Results | Candidates |
| Alabama | J. Thomas Heflin | Democratic | 1920 (special) 1924 | Incumbent lost renomination. Incumbent lost general election as an independent. New senator elected. Democratic hold. | ▌Y John H. Bankhead II (Democratic) 59.7% ▌J. Thomas Heflin (Independent) 40.3% |
| Arkansas | Joseph T. Robinson | Democratic | 1913 1918 1924 | Incumbent re-elected. | ▌Y Joseph T. Robinson (Democratic) Unopposed |
| Colorado | Lawrence C. Phipps | Republican | 1918 1924 | Incumbent retired. New senator elected. Democratic gain. | ▌Y Edward P. Costigan (Democratic) 55.9% ▌George H. Shaw (Republican) 42.7% |
| Delaware | Daniel O. Hastings | Republican | 1928 (Appointed) | Interim appointee elected. Winner was also elected on the same ballot to finish the current term; see above. | ▌Y Daniel O. Hastings (Republican) 54.5% ▌Thomas F. Bayard Jr. (Democratic) 45.4% |
| Georgia | William J. Harris | Democratic | 1918 1924 | Incumbent re-elected. | ▌Y William J. Harris (Democratic) Unopposed |
| Idaho | William Borah | Republican | 1907 1913 1918 1924 | Incumbent re-elected. | ▌Y William Borah (Republican)72.4% ▌Joseph M. Tyler (Democratic) 27.6% |
| Illinois | Charles S. Deneen | Republican | 1924 1925 (Appointed) | Incumbent lost renomination. New senator elected. Democratic gain. | ▌Y J. Hamilton Lewis (Democratic) 64.0% ▌Ruth Hanna McCormick (Republican) 30.7% |
| Iowa | Daniel F. Steck | Democratic | 1926 (Challenge) | Incumbent lost re-election. New senator elected. Republican gain. | ▌Y L. J. Dickinson (Republican) 56.3% ▌Daniel F. Steck (Democratic) 43.0% |
| Kansas | Arthur Capper | Republican | 1918 1924 | Incumbent re-elected. | ▌Y Arthur Capper (Republican) 61.1% ▌Jonathan M. Davis (Democratic) 38.9% |
| Kentucky | John M. Robsion | Republican | 1930 (Appointed) | Interim appointee lost election. New senator elected. Democratic gain. | ▌Y M. M. Logan (Democratic) 52.1% ▌John M. Robsion (Republican) 47.9% |
| Louisiana | Joseph E. Ransdell | Democratic | 1912 1918 1924 | Incumbent lost renomination. New senator elected. Democratic hold. | ▌Y Huey Long (Democratic) Unopposed |
| Maine | Arthur R. Gould | Republican | 1926 (Appointed) | Incumbent retired. New senator elected. Republican hold. | ▌Y Wallace H. White (Republican) 60.9% ▌Frank W. Haskell (Democratic) 39.1% |
| Massachusetts | Frederick H. Gillett | Republican | 1924 | Incumbent retired. New senator elected. Democratic gain. | ▌Y Marcus A. Coolidge (Democratic) 54.0% ▌William M. Butler (Republican) 44.7% |
| Michigan | James Couzens | Republican | 1922 (Appointed) 1924 (special) 1924 | Incumbent re-elected. | ▌Y James Couzens (Republican) 78.2% ▌Thomas A. E. Weadock (Democratic) 20.9% |
| Minnesota | Thomas D. Schall | Republican | 1924 | Incumbent re-elected. | ▌Y Thomas D. Schall (Republican) 37.6% ▌Einar Hoidale (Democratic) 36.1% ▌Ernest Lundeen (Farmer–Labor) 22.9% |
| Mississippi | Pat Harrison | Democratic | 1918 1924 | Incumbent re-elected. | ▌Y Pat Harrison (Democratic) Unopposed |
| Montana | Thomas J. Walsh | Democratic | 1913 1918 1924 | Incumbent re-elected. | ▌Y Thomas J. Walsh (Democratic) 60.3% ▌Albert J. Galen (Republican) 37.9% |
| Nebraska | George W. Norris | Republican | 1913 1918 1924 | Incumbent re-elected. | ▌Y George W. Norris (Republican) 56.8% ▌Gilbert Hitchcock (Democratic) 39.7% |
| New Hampshire | Henry W. Keyes | Republican | 1918 1924 | Incumbent re-elected. | ▌Y Henry W. Keyes (Republican) 57.9% ▌Albert W. Noone (Democratic) 41.9% |
| New Jersey | David Baird Jr. | Republican | 1929 (Appointed) | Interim appointee retired. New senator elected. Republican hold. Winner also elected to finish the term; see above. | ▌Y Dwight Morrow (Republican) 58.5% ▌Alexander Simpson (Democratic) 39.0% |
| New Mexico | Sam G. Bratton | Democratic | 1924 | Incumbent re-elected. | ▌Y Sam G. Bratton (Democratic) 58.6% ▌Herbert B. Holt (Republican) 41.2% |
| North Carolina | F. M. Simmons | Democratic | 1901 1907 1913 1918 1924 | Incumbent lost renomination. New senator elected. Democratic hold. | ▌Y Josiah Bailey (Democratic) 60.6% ▌George M. Pritchard (Republican) 39.4% |
| Oklahoma | William B. Pine | Republican | 1924 | Incumbent lost re-election. New senator elected. Democratic gain. | ▌Y Thomas Gore (Democratic) 52.3% ▌William B. Pine (Republican) 47.5% |
| Oregon | Charles L. McNary | Republican | 1917 (Appointed) 1918 (Not elected) 1918 (Appointed) 1918 1924 | Incumbent re-elected. | ▌Y Charles L. McNary (Republican) 58.1% ▌Elton Watkins (Democratic) 27.9% ▌L. A. Banks (Independent) 7.4% |
| Rhode Island | Jesse H. Metcalf | Republican | 1924 (special) 1924 | Incumbent re-elected. | ▌Y Jesse H. Metcalf (Republican) 50.3% ▌Peter G. Gerry (Democratic) 49.2% |
| South Carolina | Cole L. Blease | Democratic | 1924 | Incumbent lost renomination. New senator elected. Democratic hold. | ▌Y James F. Byrnes (Democratic) Unopposed |
| South Dakota | William H. McMaster | Republican | 1924 | Incumbent lost re-election. New senator elected. Democratic gain. | ▌Y William J. Bulow (Democratic) 51.6% ▌William H. McMaster (Republican) 48.4% |
| Tennessee | William E. Brock | Democratic | 1929 (Appointed) | Incumbent retired. New senator elected. Democratic hold. | ▌Y Cordell Hull (Democratic) 71.3% ▌Paul E. Divine (Republican) 27.1% |
| Texas | Morris Sheppard | Democratic | 1913 (special) 1913 1918 1924 | Incumbent re-elected. | ▌Y Morris Sheppard (Democratic) 86.9% ▌D. J. Haesly (Republican) 12.7% |
| Virginia | Carter Glass | Democratic | 1920 (Appointed) 1920 (special) 1924 | Incumbent re-elected. | ▌Y Carter Glass (Democratic) 76.7% ▌J. Cloyd Byars (Independent) 17.9% ▌Joe C. Morgan (Socialist) 5.4% |
| West Virginia | Guy D. Goff | Republican | 1924 | Incumbent retired. New senator elected. Democratic gain. | ▌Y Matthew M. Neely (Democratic) 61.9% ▌James E. Jones (Republican) 37.9% |
| Wyoming | Patrick J. Sullivan | Republican | 1929 (Appointed) | Interim appointee retired. New senator elected. Republican hold. Winner was also elected to finish the term; see above. | ▌Y Robert D. Carey (Republican) 59.1% ▌Harry Schwartz (Democratic) 41.0% |

## Closest races

Ten races had a margin of victory under 10%:
| State | Party of winner | Margin |
| Rhode Island | Republican | 1.1% |
| Minnesota | Republican | 1.5% |
| Kansas (special) | Democratic (flip) | 2.0% |
| South Dakota | Democratic (flip) | 3.2% |
| Kentucky (regular) | Democratic (flip) | 4.2% |
| Kentucky (special) | Democratic (flip) | 4.6% |
| Oklahoma | Democratic (flip) | 4.8% |
| Delaware | Republican | 9.1% |
| Massachusetts | Democratic (flip) | 9.3% |
| Ohio | Democratic (flip) | 9.6% |

## Alabama

1930 United States Senate election in Alabama :
| Party | Party | Candidate | Votes | % |
| | Democratic | John H. Bankhead II | 150,985 | 59.93 |
| | Independent | James Thomas Heflin (Incumbent) | 100,952 | 40.07 |
| Majority | Majority | Majority | 50,033 | 19.96 |
| Turnout | Turnout | Turnout | 251,937 | |
| | Democratic gain from Independent | Democratic gain from Independent | Democratic gain from Independent | Democratic gain from Independent |

## Arkansas

1930 United States Senate election in Arkansas :
| Party | Party | Candidate | Votes | % |
| | Democratic | Joseph T. Robinson (Incumbent) | 141,906 | 100.00 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Colorado

1930 United States Senate election in Colorado :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edward P. Costigan | 180,028 | 55.85 |
| | Republican | George H. Shaw | 137,487 | 42.65 |
| | Socialist | Morton Alexander | 1,745 | 0.54 |
| | Farmer–Labor | H. H. Marrs | 1,367 | 0.42 |
| | Communist | James Allander | 924 | 0.29 |
| | Liberal Party (US) | Frank H. Rice | 451 | 0.14 |
| | Commonwealth Land | August Lutteken | 339 | 0.11 |
| Majority | Majority | Majority | 42,541 | 13.20 |
| Turnout | Turnout | Turnout | 322,341 | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## Delaware

Interim appointee Daniel O. Hastings was elected both to finish the current term and to the next term on the same November 4 ballot.

### Delaware (regular)

Delaware regular election, November 4, 1930 :
| Party | Party | Candidate | Votes | % |
| | Republican | Daniel O. Hastings (Incumbent) | 47,909 | 54.49 |
| | Democratic | Thomas F. Bayard Jr. | 39,881 | 45.36 |
| | Independent | Nicholas Minutella | 135 | 0.15 |
| Majority | Majority | Majority | 8,028 | 9.13 |
| Turnout | Turnout | Turnout | 87,925 | 36.88 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### Delaware (special)

Delaware special election, November 4, 1930 :
| Party | Party | Candidate | Votes | % |
| | Republican | Daniel O. Hastings (Incumbent) | 47,909 | 54.49 |
| | Democratic | Thomas F. Bayard Jr. | 39,881 | 45.36 |
| | Independent | Nicholas Minutella | 135 | 0.15 |
| Majority | Majority | Majority | 8,028 | 9.13 |
| Turnout | Turnout | Turnout | 87,925 | 36.88 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Georgia

1930 United States Senate election in Georgia :
| Party | Party | Candidate | Votes | % |
| | Democratic | William J. Harris (Incumbent) | 56,502 | 100.00 |
| | Independent | Wallace Miller | 1 | 0.00 |
| Majority | Majority | Majority | 56,501 | 100.00 |
| Turnout | Turnout | Turnout | 56,503 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Idaho

1930 United States Senate election in Idaho :
| Party | Party | Candidate | Votes | % |
| | Republican | William Borah (Incumbent) | 94,938 | 72.42% |
| | Democratic | Joseph M. Tyler | 36,162 | 27.58% |
| Majority | Majority | Majority | 58,776 | 44.84 |
| Turnout | Turnout | Turnout | 131,100 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Illinois

1930 United States Senate election in Illinois :
| Party | Party | Candidate | Votes | % |
| | Democratic | J. Hamilton Lewis | 1,432,216 | 64.02 |
| | Republican | Ruth Hanna McCormick | 687,469 | 30.73 |
| | Independent Republican | Lottie Holman O'Neill | 99,485 | 4.45 |
| | Socialist | George Koop | 11,192 | 0.50 |
| | Communist | Freeman Thompson | 3,118 | 0.14 |
| | Peace and Prosperity | Louis Warner | 1,078 | 0.05 |
| | American National | Ernest Stout | 1,060 | 0.05 |
| | Anti-League World Court, Anti-Foreign Entanglements | C. Emmet Smith | 763 | 0.03 |
| | Liberty | James J. McGrath | 723 | 0.03 |
| Majority | Majority | Majority | 744,747 | 33.29 |
| Turnout | Turnout | Turnout | 2,237,104 | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## Iowa

1930 United States Senate election in Iowa :
| Party | Party | Candidate | Votes | % |
| | Republican | Lester J. Dickinson | 307,613 | 56.29 |
| | Democratic | Daniel F. Steck (Incumbent) | 235,186 | 43.03 |
| | Independent | Arthur A. Wells | 2,668 | 0.49 |
| | Independent | L. E. Eickelberg | 1,045 | 0.19 |
| Majority | Majority | Majority | 72,427 | 13.26 |
| Turnout | Turnout | Turnout | 546,512 | |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

## Kansas
### Kansas (regular)

Kansas regular election :
| Party | Party | Candidate | Votes | % |
| | Republican | Arthur Capper (Incumbent) | 364,548 | 61.09 |
| | Democratic | Jonathan M. Davis | 232,161 | 38.91 |
| Majority | Majority | Majority | 132,387 | 22.18 |
| Turnout | Turnout | Turnout | 596,709 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### Kansas (special)

Democratic nominee George McGill defeated Republican incumbent United States Senator Henry Justin Allen by a very narrow margin. McGill was the first non-Republican to win this seat since 1896.
Kansas special election :
| Party | Party | Candidate | Votes | % |
| | Democratic | George McGill | 288,889 | 50.03 |
| | Republican | Henry Justin Allen (Incumbent) | 276,833 | 47.95 |
| | Socialist | H. M. Perkins | 11,659 | 2.02 |
| Majority | Majority | Majority | 12,056 | 0.08 |
| Turnout | Turnout | Turnout | 577,381 | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## Kentucky
### Kentucky (regular)

Kentucky regular election :
| Party | Party | Candidate | Votes | % |
| | Democratic | M. M. Logan | 336,718 | 52.13 |
| | Republican | John M. Robsion (incumbent) | 309,180 | 47.87 |
| Majority | Majority | Majority | 27,538 | 4.26 |
| Turnout | Turnout | Turnout | 645,898 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### Kentucky (special)

Kentucky special election :
| Party | Party | Candidate | Votes | % |
| | Democratic | Ben M. Williamson | 326,723 | 52.34 |
| | Republican | John M. Robsion (Incumbent) | 297,510 | 47.66 |
| Majority | Majority | Majority | 29,213 | 4.68 |
| Turnout | Turnout | Turnout | 624,233 | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## Louisiana

1930 United States Senate election in Louisiana :
| Party | Party | Candidate | Votes | % |
| | Democratic | Huey Long | 130,536 | 99.98 |
| | None | Scattering | 24 | 0.02 |
| Majority | Majority | Majority | 130,512 | 99.96 |
| Turnout | Turnout | Turnout | 130,560 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Maine

1930 United States Senate election in Maine :
| Party | Party | Candidate | Votes | % |
| | Republican | Wallace H. White Jr. | 88,262 | 60.95 |
| | Democratic | Frank W. Haskell | 56,559 | 39.05 |
| Majority | Majority | Majority | 31,703 | 21.90 |
| Turnout | Turnout | Turnout | 144,821 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Massachusetts

General election :
| Party | Candidate | Votes | % | ±% |
| Democratic | Marcus A. Coolidge | 651,939 | 54.01 | 5.40 |
| Republican | William M. Butler | 539,226 | 44.67 | 5.59 |
| Socialist | Sylvester J. McBride | 7,244 | 0.60 | N/A |
| Socialist Labor | Oscar Kinsalas | 4,640 | 0.38 | N/A |
| Communist | Max Lerner | 3,962 | 0.34 | 0.80 |

## Michigan

1930 United States Senate election in Michigan :
| Party | Party | Candidate | Votes | % |
| | Republican | James J. Couzens (Incumbent) | 634,577 | 78.15 |
| | Democratic | Thomas A. E. Weadock | 169,757 | 20.91 |
| | Workers | George Powers | 3,523 | 0.43 |
| | Socialist | Milton E. Depew | 2,419 | 0.30 |
| | Prohibition | Charles Rennells | 1,718 | 0.21 |
| | None | All Others | 13 | 0.00 |
| Majority | Majority | Majority | 464,820 | 57.24 |
| Turnout | Turnout | Turnout | 812,007 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Minnesota

1930 United States Senate election in Minnesota :
| Party | Party | Candidate | Votes | % |
| | Republican | Thomas D. Schall (Incumbent) | 293,626 | 37.61 |
| | Democratic | Einar Hoidale | 282,018 | 36.13 |
| | Farmer–Labor | Ernest Lundeen | 178,671 | 22.89 |
| | Independent | Charles A. Lund | 20,669 | 2.65 |
| | Independent | Rudolph Harju | 5,645 | 0.72 |
| Majority | Majority | Majority | 11,608 | 1.48 |
| Turnout | Turnout | Turnout | 780,629 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Mississippi

1930 United States Senate election in Mississippi :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pat Harrison (Incumbent) | 33,953 | 100.00 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Montana

1930 United States Senate election in Montana :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Thomas J. Walsh (Incumbent) | 106,274 | 60.33 | +7.52% |
| | Republican | Albert J. Galen | 66,724 | 37.88 | −4.52% |
| | Farmer–Labor | Charles E. Taylor | 1,789 | 1.02 | −3.32% |
| | Socialist | John F. McKay | 1,006 | 0.57 | +0.26% |
| | Communist | Willis L. Wright | 368 | 0.21 | |
| Majority | Majority | Majority | 39,550 | 22.45 | +12.04% |
| Turnout | Turnout | Turnout | 176,161 | | |
| | Democratic hold | Democratic hold | Swing | | |

## Nebraska

1930 United States Senate election in Nebraska :
| Party | Party | Candidate | Votes | % |
| | Republican | George W. Norris (Incumbent) | 247,118 | 56.84 |
| | Democratic | Gilbert Hitchcock | 172,795 | 39.74 |
| | By Petition | Beatrice Fenton Craig | 14,884 | 3.42 |
| | N/A | Scattering | 7 | <0.01 |
| Majority | Majority | Majority | 74,323 | 17.10 |
| Turnout | Turnout | Turnout | 434,804 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## New Hampshire

1930 United States Senate election in New Hampshire :
| Party | Party | Candidate | Votes | % |
| | Republican | Henry W. Keyes (Incumbent) | 72,225 | 57.88 |
| | Democratic | Albert W. Noone | 52,284 | 41.90 |
| | Communist | Henry C. Iram | 282 | 0.23 |
| Majority | Majority | Majority | 19,941 | 15.98 |
| Turnout | Turnout | Turnout | 124,791 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## New Jersey
### New Jersey (regular)

New Jersey regular election :
| Party | Party | Candidate | Votes | % |
| | Republican | Dwight Morrow | 601,497 | 58.50 |
| | Democratic | Alexander Simpson | 401,007 | 39.00 |
| | Prohibition | Esther Hill Elfeth | 18,903 | 1.84 |
| | Socialist | Henry Jager | 4,519 | 0.44 |
| | Communist | Dozier W. Graham | 1,627 | 0.16 |
| | Socialist Labor | Alexander Kudlik | 670 | 0.07 |
| Majority | Majority | Majority | 200,490 | 19.50 |
| Turnout | Turnout | Turnout | 1,028,223 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### New Jersey (special)

New Jersey special election :
| Party | Party | Candidate | Votes | % |
| | Republican | Dwight Morrow | 571,006 | 59.14 |
| | Democratic | Thelma Parkinson | 372,739 | 38.60 |
| | Prohibition | James G. Mason | 15,512 | 1.61 |
| | Socialist | Henry Jager | 4,615 | 0.48 |
| | Communist | Dozier W. Graham | 1,700 | 0.18 |
| Majority | Majority | Majority | 198,267 | 20.54 |
| Turnout | Turnout | Turnout | 965,572 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## New Mexico

1930 United States Senate election in New Mexico :
| Party | Party | Candidate | Votes | % |
| | Democratic | Sam G. Bratton (incumbent) | 69,362 | 58.62 |
| | Republican | Herbert B. Holt | 48,699 | 41.16 |
| | Socialist | R. B. Cochran | 256 | 0.22 |
| Majority | Majority | Majority | 20,663 | 17.46 |
| Turnout | Turnout | Turnout | 118,317 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## North Carolina

1930 United States Senate election in North Carolina :
| Party | Party | Candidate | Votes | % |
| | Democratic | Josiah Bailey | 324,393 | 60.61 |
| | Republican | George M. Pritchard | 210,761 | 39.38 |
| | Independent | F. M. Simmons (Incumbent) | 26 | 0.00 |
| Majority | Majority | Majority | 113,632 | 21.23 |
| Turnout | Turnout | Turnout | 535,180 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Ohio (special)

1930 United States Senate special election in Ohio :
| Party | Party | Candidate | Votes | % |
| | Democratic | Robert J. Bulkley | 1,046,561 | 54.78 |
| | Republican | Roscoe C. McCulloch (Incumbent) | 863,944 | 45.22 |
| Majority | Majority | Majority | 182,617 | 9.56 |
| Turnout | Turnout | Turnout | 1,910,505 | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## Oklahoma

1930 United States Senate election in Oklahoma :
| Party | Party | Candidate | Votes | % |
| | Democratic | Thomas Gore | 255,838 | 52.29 |
| | Republican | William B. Pine (Incumbent) | 232,589 | 47.54 |
| | Independent | Edward D. Evans | 614 | 0.13 |
| | Independent | Thomas P. Hopley | 218 | 0.04 |
| Majority | Majority | Majority | 23,249 | 4.75 |
| Turnout | Turnout | Turnout | 489,259 | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## Oregon

1930 United States Senate election in Oregon :
| Party | Party | Candidate | Votes | % |
| | Republican | Charles L. McNary (Incumbent) | 137,231 | 58.06 |
| | Democratic | Elton Watkins | 66,028 | 27.93 |
| | Independent | L. A. Banks | 17,488 | 7.40 |
| | Independent | H. H. Stallard | 10,573 | 4.47 |
| | Independent Socialist Labor | O. D. Teel | 5,051 | 2.14 |
| | None | All Others | 5 | 0.00 |
| Majority | Majority | Majority | 71,203 | 30.13 |
| Turnout | Turnout | Turnout | 236,376 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Pennsylvania (special)

1930 United States Senate special election in Pennsylvania :
| Party | Party | Candidate | Votes | % |
| | Republican | James J. Davis | 1,462,186 | 71.54 |
| | Democratic | Sedgwick Kistler | 523,338 | 25.61 |
| | Socialist | William J. Van Essen | 26,796 | 1.31 |
| | Prohibition | S. W. Bierer | 24,498 | 1.20 |
| | Communist | Emmett Patrick Cush | 6,960 | 0.34 |
| Majority | Majority | Majority | 938,848 | 45.93 |
| Turnout | Turnout | Turnout | 2,043,820 | |
| | Republican hold | Republican hold | Swing | |

## Rhode Island

1930 United States Senate election in Rhode Island :
| Party | Party | Candidate | Votes | % |
| | Republican | Jesse H. Metcalf (Incumbent) | 112,202 | 50.30 |
| | Democratic | Peter G. Gerry | 109,687 | 49.17 |
| | Socialist Labor | Charles F. Bishop | 1,195 | 0.54 |
| Majority | Majority | Majority | 2,515 | 1.13 |
| Turnout | Turnout | Turnout | 223,084 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |
Incumbent Republican Senator Jesse H. Metcalf successfully sought reelection to a 2nd term in office. As of 2023, this is the last time a Republican has won the Class 2 Senate seat in Rhode Island, and it would be the last time a Republican would win any Senate seat in the state at all until John Chafee in 1976.

## South Carolina

South Carolina U.S. Senate Election, 1930 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | James F. Byrnes | 16,211 | 100.0 | 0.0 |
| Majority | Majority | Majority | 16,211 | 100.0 | 0.0 |
| Turnout | Turnout | Turnout | 16,211 | | |
| | Democratic hold | Democratic hold | Swing | | |

## South Dakota

1930 United States Senate election in South Dakota :
| Party | Party | Candidate | Votes | % |
| | Democratic | William J. Bulow | 106,317 | 51.63 |
| | Republican | William H. McMaster (Incumbent) | 99,595 | 48.37 |
| Majority | Majority | Majority | 6,722 | 3.26 |
| Turnout | Turnout | Turnout | 205,912 | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## Tennessee

One-term Democrat Lawrence D. Tyson died August 24, 1929, and Democrat William E. Brock was appointed September 2, 1929, to continue the term, pending a special election.

### Tennessee (special)

Interim Democrat William E. Brock easily won election to finish the term.
Tennessee special Democratic primary (August 7, 1930) :
| Party | Party | Candidate | Votes | % |
| | Democratic | William E. Brock (incumbent) | 113,492 | 70.67 |
| | Democratic | John Randolph Neal Jr. | 47,110 | 29.33 |
| Majority | Majority | Majority | 66,382 | 41.33 |
| Turnout | Turnout | Turnout | | 6.14 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |
Tennessee special election :
| Party | Party | Candidate | Votes | % |
| | Democratic | William E. Brock (incumbent) | 144,019 | 74.40 |
| | Republican | F. Todd Meacham | 49,554 | 25.60 |
| Majority | Majority | Majority | 94,465 | 48.80 |
| Turnout | Turnout | Turnout | 193,573 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### Tennessee (regular)

William E. Brock was not a candidate to the next term, instead choosing to return to his Chattanooga candy manufacturing business. Instead, former Democratic congressman Cordell Hull was swept into the seat.
Tennessee regular election :
| Party | Party | Candidate | Votes | % |
| | Democratic | Cordell Hull | 154,131 | 71.30 |
| | Republican | Paul E. Divine | 58,650 | 27.13 |
| | Communist | Sherman Bell | 3,392 | 1.57 |
| Majority | Majority | Majority | 95,481 | 44.17 |
| Turnout | Turnout | Turnout | 216,173 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |
Hull was appointed United States Secretary of State and served there for 11 years, and in 1945, he was awarded the Nobel Peace Prize for "co-initiating the United Nations."

## Texas

1930 United States Senate election in Texas :
| Party | Party | Candidate | Votes | % |
| | Democratic | Morris Sheppard (Incumbent) | 266,550 | 86.91 |
| | Republican | D. J. Haesly | 39,047 | 12.73 |
| | Socialist | Guy L. Smith | 808 | 0.26 |
| | Communist | W. A. Berry | 296 | 0.10 |
| Majority | Majority | Majority | 227,503 | 74.19 |
| Turnout | Turnout | Turnout | 306,701 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Virginia

1930 United States Senate election in Virginia :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Carter Glass (Incumbent) | 112,002 | 76.67 | +3.55% |
| | Independent Democratic | J. Cloyd Byars | 26,091 | 17.86 | +17.86% |
| | Socialist | Joe C. Morgan | 7,944 | 5.44 | +5.44% |
| | Write-ins | | 49 | 0.03 | +0.03% |
| Majority | Majority | Majority | 85,911 | 58.81 | +9.87% |
| Turnout | Turnout | Turnout | 146,086 | | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## West Virginia

1930 United States Senate election in West Virginia :
| Party | Party | Candidate | Votes | % |
| | Democratic | Matthew M. Neely | 342,437 | 61.91 |
| | Republican | James Elwood Jones | 209,427 | 37.86 |
| | Prohibition | John Wesley MacDonald | 1,293 | 0.23 |
| Majority | Majority | Majority | 133,010 | 24.05 |
| Turnout | Turnout | Turnout | 553,157 | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## Wyoming

Six-term Republican Francis E. Warren had died November 24, 1929, and Republican Patrick J. Sullivan was appointed to continue the term, pending a special election in which he was not a candidate.

### Wyoming (special)

Wyoming special election :
| Party | Party | Candidate | Votes | % |
| | Republican | Robert D. Carey | 42,726 | 58.83 |
| | Democratic | Henry H. Schwartz | 29,904 | 41.17 |
| Majority | Majority | Majority | 12,822 | 17.66 |
| Turnout | Turnout | Turnout | 72,630 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### Wyoming (regular)

Wyoming regular election :
| Party | Party | Candidate | Votes | % |
| | Republican | Robert D. Carey | 43,524 | 58.99 |
| | Democratic | Henry H. Schwartz | 30,259 | 41.01 |
| Majority | Majority | Majority | 13,265 | 17.98 |
| Turnout | Turnout | Turnout | 73,783 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |