| Election Name: | 1990 United States Senate election in Minnesota |
| Country: | Minnesota |
| Flag Image: | File:Flag of Minnesota (1983-2024).svg |
| Flag Year: | 1983 |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1984 United States Senate election in Minnesota |
| Previous Year: | 1984 |
| Next Election: | 1996 United States Senate election in Minnesota |
| Next Year: | 1996 |
| Election Date: | November 6, 1990 |
| Image1: | Paul Wellstone (cropped).jpg |
| Nominee1: | Paul Wellstone |
| Party1: | Minnesota Democratic–Farmer–Labor Party |
| Popular Vote1: | 911,999 |
| Percentage1: | 50.49% |
| Nominee2: | Rudy Boschwitz |
| Party2: | Independent-Republicans of Minnesota |
| Popular Vote2: | 864,375 |
| Percentage2: | 47.86% |
| Map Size: | 280px |
| U.S. Senator | |
| Before Election: | Rudy Boschwitz |
| Before Party: | Independent-Republicans of Minnesota |
| After Election: | Paul Wellstone |
| After Party: | Minnesota Democratic–Farmer–Labor Party |
The 1990 United States Senate election in Minnesota was held on November 6, 1990. Incumbent Republican U.S. Senator Rudy Boschwitz was defeated by Democratic challenger Paul Wellstone in a tight race. Widely considered an underdog and outspent by a 7-to-1 margin, Wellstone was the only candidate to defeat an incumbent senator as well as the only candidate to flip a seat in the 1990 election cycle and gained national attention after his upset victory. The race was also notable as the first in the history of the U.S. Senate where both major-party candidates were Jewish.
Paul Wellstone was considered to be a longshot candidate, being outspent by a margin of 7-to-1. Wellstone used grassroots campaigning tactics, and quirky campaign ads like "Fast Paul", where he spoke quickly about himself and his platform, and "Looking for Rudy", a two minute ad where he went searching for his opponent Rudy Boschwitz throughout Minnesota.