| State: | NM |
| Type: | SR |
| Route: | 51 |
| Map Custom: | yes |
| Length Mi: | 17.857 |
| Length Ref: | [1] |
| Direction A: | West |
| Terminus A: | in Truth or Consequences |
| Direction B: | East |
| Terminus B: | County Road A013 in Engle |
| Counties: | Sierra |
| Previous Type: | NM |
| Previous Route: | 50 |
| Next Type: | NM |
| Next Route: | 52 |
State Road 51 (NM 51) is a state highway in the US state of New Mexico. Its total length is approximately 17.9miles. NM 51's western terminus is at Interstate 25 Business (I-25 Bus.) in Truth or Consequences, and the eastern terminus is a continuation as County Road A013 in Engle.