| State: | AR |
| Type: | AR |
| Route: | 173 |
| Map Custom: | yes |
| Length Mi: | 6.66 |
| Length Ref: | [1] |
| Established: | July 18, 1985[2] |
| Direction A: | South |
| Terminus A: | Overflow National Wildlife Refuge |
| Direction B: | North |
| Terminus B: | in Wilmot |
| Counties: | Ashley |
| Previous Type: | AR |
| Previous Route: | 172 |
| Next Type: | AR |
| Next Route: | 174 |
Highway 173 (AR 173, Ark. 173, and Hwy. 173) is a north–south state highway in Southeast Arkansas. The route begins at the Overflow National Wildlife Refuge (NWR) and runs north to U.S. Route 165 in Wilmot. The route is maintained by the Arkansas Department of Transportation (ArDOT).
Highway 173 begins at Overflow NWR in southeastern Ashley County just over 2.5miles north of the Louisiana state line in a region known as the Lower Arkansas Delta. The area is known for flat, agricultural land with swamps, bayous and small towns dotting the landscape. The highway runs northeast, crossing Bayou Bartholomew before terminating at US 165 along then north edge of Wilmot.[3]
The highway was created from a former alignment of Highway 52 at the request of the county judge on July 18, 1985.