| Election Name: | 1956 United States Senate election in New Hampshire |
| Country: | New Hampshire |
| Flag Year: | 1931 |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1954 United States Senate special election in New Hampshire |
| Previous Year: | 1954 (special) |
| Next Election: | 1962 United States Senate election in New Hampshire |
| Next Year: | 1962 |
| Election Date: | November 6, 1956 |
| Nominee1: | Norris Cotton |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 161,424 |
| Percentage1: | 64.07% |
| Nominee2: | Laurence M. Pickett |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 90,519 |
| Percentage2: | 35.93% |
| Map Size: | 245px |
| U.S. Senator | |
| Before Election: | Norris Cotton |
| Before Party: | Republican Party (United States) |
| After Election: | Norris Cotton |
| After Party: | Republican Party (United States) |
The 1956 United States Senate election in New Hampshire took place on November 6, 1956. Incumbent Republican Senator Norris Cotton won re-election to a full term, having first been elected in a 1954 special election.
Primary elections were held on September 11, 1956.