| State: | NM |
| Type: | SR |
| Route: | 605 |
| Length Mi: | 22.234 |
| Length Ref: | [1] |
| Direction A: | South |
| Terminus A: | in Milan |
| Direction B: | North |
| Terminus B: | End of state maintenance in San Mateo |
| Counties: | Cibola, McKinley |
| Previous Type: | NM |
| Previous Route: | 603 |
| Next Type: | NM |
| Next Route: | 606 |
State Road 605 (NM 605) is a 22.2adj=midNaNadj=mid state highway in the US state of New Mexico. NM 605's southern terminus is at NM 122 in Milan, and the northern terminus is at the end of state maintenance in San Mateo.