| Election Name: | 2004 United States Senate election in Kansas |
| Country: | Kansas |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1998 United States Senate election in Kansas |
| Previous Year: | 1998 |
| Next Election: | 2010 United States Senate election in Kansas |
| Next Year: | 2010 |
| Election Date: | November 2, 2004 |
| Image1: | File:Sam Brownback official portrait.jpg |
| Nominee1: | Sam Brownback |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 780,863 |
| Percentage1: | 69.16% |
| Nominee2: | Lee Jones |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 310,337 |
| Percentage2: | 27.49% |
| Map Size: | 270px |
| U.S. Senator | |
| Before Election: | Sam Brownback |
| Before Party: | Republican Party (United States) |
| After Election: | Sam Brownback |
| After Party: | Republican Party (United States) |
The 2004 United States Senate election in Kansas was held November 2, 2004. Incumbent Republican U.S. Senator Sam Brownback won re-election to a second term.
Though Robert Conroy won the Democratic nomination, he dropped out of the race shortly after becoming the nominee, noting that he expected Jones to win and was tired of campaigning. The Kansas Democratic Party selected Lee Jones as the replacement candidate.[1]
Brownback raised $2.5 million for his re-election campaign, while Jones raised only $90,000. Kansas last elected a Democratic senator in 1932. Brownback was very popular in the state.[2]