See also: New Mexico's at-large congressional district.
| Election Name: | 1940 United States House election in New Mexico |
| Country: | New Mexico |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1938 United States House of Representatives election in New Mexico |
| Previous Year: | 1938 |
| Next Election: | 1942 United States House of Representatives election in New Mexico |
| Next Year: | 1942 |
| Election Date: | November 5, 1940 |
| Image1: | Clinton P. Anderson - Secretary of Agriculture.jpg |
| Nominee1: | Clinton Anderson |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 106,972 |
| Percentage1: | 58.8% |
| Nominee2: | Herman R. Crile |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 75,085 |
| Percentage2: | 41.2% |
| Map Size: | 215px |
| Representative At-large | |
| Before Election: | John J. Dempsey |
| Before Party: | Democratic Party (United States) |
| After Election: | Clinton Anderson |
| After Party: | Democratic Party (United States) |
The 1940 United States House of Representatives election in New Mexico was held on Tuesday November 5, 1940 to elect the state's at-large representative to serve in the 77th United States Congress. Incumbent John J. Dempsey chose to run for the US Senate instead of seeking a fourth term in congress. Clinton Anderson won the open seat by 17.52% outperforming Franklin D. Roosevelt in the concurrent Presidential election by 4.21 percentage points.