| Election Name: | 1998 United States Senate election in New Hampshire |
| Country: | New Hampshire |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1992 United States Senate election in New Hampshire |
| Previous Year: | 1992 |
| Next Election: | 2004 United States Senate election in New Hampshire |
| Next Year: | 2004 |
| Election Date: | November 3, 1998 |
| Image1: | File:Judd Gregg.jpg |
| Nominee1: | Judd Gregg |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 213,477 |
| Percentage1: | 67.84% |
| Nominee2: | George Condodemetraky |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 88,883 |
| Percentage2: | 28.24% |
| U.S. Senator | |
| Before Election: | Judd Gregg |
| Before Party: | Republican Party (United States) |
| After Election: | Judd Gregg |
| After Party: | Republican Party (United States) |
The 1998 United States Senate election in New Hampshire was held on November 3, 1998. Incumbent Republican U.S. Senator Judd Gregg won re-election to his second term.