| State: | NM |
| Type: | SR |
| Route: | 505 |
| Map Custom: | yes |
| Length Mi: | 11.973 |
| Length Ref: | [1] |
| Direction A: | South |
| Terminus A: | near Maxwell |
| Direction B: | North |
| Terminus B: | near Cimarron |
| Counties: | Colfax |
| Previous Type: | NM |
| Previous Route: | 503 |
| Next Type: | NM |
| Next Route: | 506 |
State Road 505 (NM 505) is a 12adj=midNaNadj=mid state highway in the US state of New Mexico. NM 505's southern terminus is at NM 445 north of Maxwell, and the northern terminus is at U.S. Route 64 (US 64) east-northeast of Cimarron.