| Election Name: | 1972 United States Senate election in New Hampshire |
| Country: | New Hampshire |
| Flag Year: | 1931 |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1966 United States Senate election in New Hampshire |
| Previous Year: | 1966 |
| Next Election: | 1978 United States Senate election in New Hampshire |
| Next Year: | 1978 |
| Election Date: | November 7, 1972 |
| Image1: | File:M000486.jpg |
| Nominee1: | Thomas J. McIntyre |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 184,495 |
| Percentage1: | 56.88% |
| Nominee2: | Wesley Powell |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 139,852 |
| Percentage2: | 43.12% |
| Map Size: | 220px |
| U.S. Senator | |
| Before Election: | Thomas J. McIntyre |
| Before Party: | Democratic Party (United States) |
| After Election: | Thomas J. McIntyre |
| After Party: | Democratic Party (United States) |
The 1972 United States Senate election in New Hampshire took place on November 7, 1972. Incumbent Democratic Senator Thomas J. McIntyre won re-election to a third term. Democrats would not win this seat again until 2008. This was the first time Democrats were re-elected to any Senate seat in New Hampshire.
New Hampshire was one of fifteen states alongside Alabama, Arkansas, Colorado, Delaware, Georgia, Iowa, Louisiana, Maine, Minnesota, Mississippi, Montana, Rhode Island, South Dakota and West Virginia that were won by Republican President Richard Nixon in 1972 that elected Democrats to the United States Senate.
Primary elections were held on September 12, 1972.