| State: | UT |
| Type: | SR |
| Route: | 172 |
| Alternate Name: | 5600 West |
| Section: | 123 |
| Map Custom: | yes |
| Map Notes: | SR-172 highlighted in red |
| Length Mi: | 9.218 |
| Length Round: | 3 |
| Length Ref: | [1] |
| Established: | 1985 |
| Direction A: | South |
| Terminus A: | 6200 South in Kearns |
| Direction B: | North |
| Terminus B: | in Salt Lake City |
| Junction: | in West Valley City in West Valley City |
| Previous Type: | SR |
| Previous Route: | 171 |
| Next Type: | SR |
| Next Route: | 173 |
State Route 172 (SR-172) is a state highway in the U.S. state of Utah connecting 6200 South and West Valley City to SR-201 and I-80 via 5600 West in a span of 9.22miles. The highway was formed in 1985.
The route begins at the junction of 6200 South and 5600 West and heads due north on the latter as a two-lane undivided highway, with wide shoulders on each side. Past the intersection of SR-173, the road widens to four lanes. Past the diamond interchange at SR-201, the route loses two lanes in each direction. The highway continues in this manner until it terminates at the diamond interchange at I-80.[2]
All of SR-172 has been included in the National Highway System.[3]
State Route 172 was formed in 1985 by the Utah Transportation Commission. Since the route's formation, it has not been changed.[4]