| Election Name: | 1940 New Mexico gubernatorial election |
| Type: | presidential |
| Country: | New Mexico |
| Previous Election: | 1938 New Mexico gubernatorial election |
| Previous Year: | 1938 |
| Next Election: | 1942 New Mexico gubernatorial election |
| Next Year: | 1942 |
| Ongoing: | no |
| Election Date: | November 5, 1940 |
| Nominee1: | John E. Miles |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 103,035 |
| Percentage1: | 55.59% |
| Nominee2: | Mauricio F. Miera |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 82,306 |
| Percentage2: | 44.41% |
| Map Size: | 215px |
| Governor | |
| Before Election: | John E. Miles |
| Before Party: | Democratic Party (United States) |
| After Election: | John E. Miles |
| After Party: | Democratic Party (United States) |
The 1940 New Mexico gubernatorial election took place on November 5, 1940, in order to elect the Governor of New Mexico. Incumbent Democrat John E. Miles won reelection to a second term. Former governor Clyde Tingley unsuccessfully sought the Democratic nomination. This was the first gubernatorial election since 1924 in which Bernalillo County backed the losing candidate. This was the last election until 2006 in which Lincoln County backed a Democrat and San Juan County did not vote Democratic again until 1962.
| County | John E. Miles Democratic | Mauricio F. Miera Republican | Margin | Total votes cast | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % | % | % | |||||||||||||
| Bernalillo | 12,687 | 47.24% | 14,171 | 52.76% | -1,484 | -5.53% | 26,858 | ||||||||
| Catron | 1,049 | 52.11% | 964 | 47.89% | 85 | 4.22% | 2,013 | ||||||||
| Chaves | 5,153 | 69.48% | 2,264 | 30.52% | 2,889 | 38.95% | 7,417 | ||||||||
| Colfax | 4,363 | 55.98% | 3,431 | 44.02% | 932 | 11.96% | 7,794 | ||||||||
| Curry | 5,007 | 78.42% | 1,378 | 21.58% | 3,629 | 56.84% | 6,385 | ||||||||
| De Baca | 1,015 | 69.14% | 453 | 30.86% | 562 | 38.28% | 1,468 | ||||||||
| Doña Ana | 4,963 | 54.88% | 4,080 | 45.12% | 883 | 9.76% | 9,043 | ||||||||
| Eddy | 5,297 | 79.11% | 1,399 | 20.89% | 3,898 | 58.21% | 6,696 | ||||||||
| Grant | 3,863 | 64.39% | 2.136 | 35.61% | 1,727 | 28.79% | 5,999 | ||||||||
| Guadalupe | 1,978 | 50.73% | 1,921 | 49.27% | 57 | 1.46% | 3,899 | ||||||||
| Harding | 996 | 49.33% | 1,023 | 50.67% | -27 | -1.34% | 2,019 | ||||||||
| Hidalgo | 1,238 | 77.76% | 354 | 22.24% | 884 | 55.53% | 1,592 | ||||||||
| Lea | 4,699 | 82.15% | 1,021 | 17.85% | 3,678 | 64.30% | 5,720 | ||||||||
| Lincoln | 1,873 | 52.20% | 1,715 | 47.80% | 158 | 4.40% | 3,588 | ||||||||
| Luna | 1,536 | 61.96% | 943 | 38.04% | 593 | 23.92% | 2,479 | ||||||||
| McKinley | 2,662 | 62.75% | 1,580 | 37.25% | 1,082 | 25.51% | 4,242 | ||||||||
| Mora | 1,733 | 39.47% | 2,658 | 60.53% | -925 | -21.07% | 4,391 | ||||||||
| Otero | 1,898 | 55.06% | 1,549 | 44.94% | 349 | 10.12% | 3,447 | ||||||||
| Quay | 3,445 | 72.66% | 1,296 | 27.34% | 2,149 | 45.33% | 4,741 | ||||||||
| Rio Arriba | 4,273 | 46.12% | 4,991 | 53.88% | -718 | -7.75% | 9,264 | ||||||||
| Roosevelt | 3,610 | 78.05% | 1,015 | 21.95% | 2,595 | 56.11% | 4,625 | ||||||||
| San Juan | 1,766 | 54.19% | 1,493 | 45.81% | 273 | 8.38% | 3,259 | ||||||||
| San Miguel | 5,538 | 50.02% | 5,534 | 49.98% | 4 | 0.04% | 11,072 | ||||||||
| Sandoval | 1,757 | 42.79% | 2,349 | 57.21% | -592 | -14.42% | 4,106 | ||||||||
| Santa Fe | 6,417 | 49.85% | 6,456 | 50.15% | -39 | -0.30% | 12,873 | ||||||||
| Sierra | 1,504 | 50.83% | 1,455 | 49.17% | 49 | 1.66% | 2,959 | ||||||||
| Socorro | 2,361 | 45.37% | 2,843 | 54.63% | -482 | -9.26% | 5,204 | ||||||||
| Taos | 3,212 | 47.02% | 3,619 | 52.98% | -407 | -5.96% | 6,831 | ||||||||
| Torrance | 2,007 | 44.31% | 2,522 | 55.69% | -515 | -11.37% | 4,529 | ||||||||
| Union | 2,244 | 56.34% | 1,739 | 43.66% | 505 | 12.68% | 3,983 | ||||||||
| Valencia | 2,891 | 42.24% | 3,954 | 57.76% | -1,063 | -15.53% | 6,845 | ||||||||
| Total | 103,035 | 55.59% | 82,306 | 44.41% | 20,729 | 11.18% | 185,341 | ||||||||