| Country: | IND |
| Type: | SH |
| State: | Tamil Nadu |
| Route: | 173 |
| Maint: | Highways and Minor Ports Department |
| Direction A: | East |
| Terminus A: | Erode |
| Direction B: | West |
| Terminus B: | Thingalur |
| Length Km: | 26 |
| Destinations: | Nasiyanur |
| Districts: | Erode. |
State Highway 173 runs entirely inside the Erode district in the South Indian state of Tamil Nadu, India. It connects the city of Erode with Thingalur.[1]
The highway passes through Nasiyanur, Pethampalayam and Nallampatti extending to a length of 26 km.