| Election Name: | 1998 United States Senate election in Wisconsin |
| Country: | Wisconsin |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1992 United States Senate election in Wisconsin |
| Previous Year: | 1992 |
| Next Election: | 2004 United States Senate election in Wisconsin |
| Next Year: | 2004 |
| Election Date: | November 3, 1998 |
| Image1: | Russ Feingold official photo.jpg |
| Nominee1: | Russ Feingold |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 890,059 |
| Percentage1: | 50.55% |
| Nominee2: | Mark Neumann |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 852,272 |
| Percentage2: | 48.40% |
| U.S. Senator | |
| Before Election: | Russ Feingold |
| Before Party: | Democratic Party (United States) |
| After Election: | Russ Feingold |
| After Party: | Democratic Party (United States) |
The 1998 United States Senate election in Wisconsin was held November 3, 1998. Incumbent Democratic U.S. Senator Russ Feingold won re-election to a second term.
In September 1997, Neumann announced his candidacy for the United States Senate against Russ Feingold. Both candidates had similar views on the budget surplus, although Neumann was for banning partial-birth abortion while Feingold was against a ban. Both candidates limited themselves to $3.8 million in campaign spending ($1 for every citizen of Wisconsin), although outside groups spent more than $2 million on Neumann; Feingold refused to have outside groups spend their own 'soft money' on his behalf.[1] [2] Feingold defeated Neumann by a slim 2% margin in the election. According to the Milwaukee Journal-Sentinel, Neumann had a 30,000 vote margin outside Milwaukee County, but was overwhelmed by a 68,000 vote margin in Milwaukee County. https://web.archive.org/web/20030815083510/http://www.jsonline.com/news/metro/aug03/159797.asp