| Election Name: | 2002 United States Senate election in Mississippi |
| Country: | Mississippi |
| Flag Image: | Flag of Mississippi (2001–2020).svg |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1996 United States Senate election in Mississippi |
| Previous Year: | 1996 |
| Election Date: | November 5, 2002 |
| Next Election: | 2008 United States Senate election in Mississippi |
| Next Year: | 2008 |
| Image1: | File:Thad Cochran official photo (cropped).jpg |
| Nominee1: | Thad Cochran |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 533,269 |
| Percentage1: | 84.58% |
| Map Size: | 250px |
| U.S. Senator | |
| Before Election: | Thad Cochran |
| Before Party: | Republican Party (United States) |
| After Election: | Thad Cochran |
| After Party: | Republican Party (United States) |
| Nominee2: | Shawn O'Hara |
| Party2: | Reform Party (United States) |
| Popular Vote2: | 97,226 |
| Percentage2: | 15.42% |
The 2002 United States Senate election in Mississippi was held on November 5, 2002. Incumbent Republican U.S. Senator Thad Cochran overwhelmingly won re-election to a fifth term. The Democratic Party did not field a candidate, resulting in Reform Party candidate Shawn O'Hara winning 15.42%. O'Hara's percentage of the vote was more than double Ross Perot's statewide total of 5.84% in the 1996 presidential election. His percentage was also the highest percentage for a Reform candidate in a U.S. Senate election.