| State: | NM |
| Type: | SR |
| Route: | 173 |
| Map Custom: | yes |
| Length Mi: | 18.090 |
| Length Ref: | [1] |
| Direction A: | West |
| Terminus A: | in Aztec |
| Direction B: | East |
| Counties: | San Juan |
| Previous Type: | NM |
| Previous Route: | 172 |
| Next Type: | NM |
| Next Route: | 174 |
State Road 173 (NM 173) is a 18.09adj=midNaNadj=mid state highway in the US state of New Mexico. Its western terminus is at U.S. Route 550 (US 550) in Aztec, and its eastern terminus at the end of state maintenance at the NM 511 west of Navajo Dam.