| Election Name: | 1918 United States Senate election in Kentucky |
| Country: | Kentucky |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1913 United States Senate election in Kentucky |
| Previous Year: | 1913 |
| Next Election: | 1924 United States Senate election in Kentucky |
| Next Year: | 1924 |
| Election Date: | November 5, 1918 |
| Nominee1: | Augustus O. Stanley |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 184,385 |
| Percentage1: | 50.77% |
| Nominee2: | Ben Bruner |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 178,797 |
| Percentage2: | 49.23% |
| Map Size: | 300px |
| U.S. Senator | |
| Before Election: | George Brown Martin |
| Before Party: | Democratic Party (United States) |
| After Election: | Augustus Owsley Stanley |
| After Party: | Democratic Party (United States) |
The 1918 United States Senate election in Kentucky took place on November 7, 1918. Incumbent Senator Ollie M. James sought a second term in office but died on August 18. He was replaced on the Democratic ticket by Governor Augustus Owsley Stanley, who defeated Republican Ben Bruner.
After Senator James died, Governor Stanley appointed George B. Martin to complete his unexpired term, set to end on March 3. Stanley was then nominated by the Democratic State Committee for the full term in office. He enjoyed the unified support of the Democratic Party, including Senator J. C. W. Beckham, who worried Stanley would challenge him for his own seat again in 1920 as he had in 1914, and President Woodrow Wilson. Bruner, a relative unknown, ran a campaign opposed to the prohibition of alcohol and in favor of a bill banning the German language, which Stanley had vetoed as Governor.[1]