| Election Name: | 1998 United States Senate election in South Dakota |
| Country: | South Dakota |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1992 United States Senate election in South Dakota |
| Previous Year: | 1992 |
| Next Election: | 2004 United States Senate election in South Dakota |
| Next Year: | 2004 |
| Election Date: | November 3, 1998 |
| Image1: | TomDaschle (2).jpg |
| Nominee1: | Tom Daschle |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 162,884 |
| Percentage1: | 62.14% |
| Nominee2: | Ron Schmidt |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 95,431 |
| Percentage2: | 36.41% |
| Map Size: | 260px |
| U.S. Senator | |
| Before Election: | Tom Daschle |
| Before Party: | Democratic Party (United States) |
| After Election: | Tom Daschle |
| After Party: | Democratic Party (United States) |
The 1998 United States Senate election in South Dakota was held November 2, 1998. Incumbent Democratic U.S. Senator Tom Daschle won re-election to a third term., this was the last time a Democrat won the Class 3 Senate seat from South Dakota.