| Election Name: | 1924 United States Senate election in South Dakota |
| Country: | South Dakota |
| Flag Year: | 1909 |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1918 United States Senate election in South Dakota |
| Previous Year: | 1918 |
| Next Election: | 1930 United States Senate election in South Dakota |
| Next Year: | 1930 |
| Election Date: | November 4, 1924 |
| Nominee1: | William H. McMaster |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 90,006 |
| Percentage1: | 44.13% |
| Nominee2: | Ulysses Cherry |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 63,728 |
| Percentage2: | 31.24% |
| Nominee4: | Tom Ayres |
| Party4: | Farmer–Labor Party |
| Popular Vote4: | 20,952 |
| Percentage4: | 10.27% |
| Nominee5: | George W. Egan |
| Party5: | Independent (politician) |
| Popular Vote5: | 14,484 |
| Percentage5: | 7.10% |
| Map Size: | 240px |
| U.S. Senator | |
| Before Election: | Thomas Sterling |
| Before Party: | Republican Party (United States) |
| After Election: | William H. McMaster |
| After Party: | Republican Party (United States) |
The 1924 United States Senate election in South Dakota took place on November 4, 1924. Incumbent Senator Thomas Sterling ran for re-election to a third term, but he was defeated in the Republican primary by Governor William H. McMaster. In the general election, McMaster was opposed by attorney Ulysses Simpson Grant Cherry, the Democratic nominee, and several independent candidates. McMaster defeated his opponents by a wide margin, but fell far short of a majority, winning only 44% of the vote.