| State: | UT |
| Type: | SR |
| Route: | 178 |
| Section: | 123 |
| Map Custom: | yes |
| Length Mi: | 1.198 |
| Length Round: | 3 |
| Length Ref: | [1] |
| Established: | 2000[2] |
| Direction A: | West |
| Terminus A: | in Payson |
| Direction B: | East |
| Terminus B: | in Payson |
| Previous Type: | SR |
| Previous Route: | 177 |
| Next Type: | SR |
| Next Route: | 180 |
State Route 178 (SR-178) is a state highway in the U.S. state of Utah. Spanning just 1.2miles in Payson, it connects Interstate 15 to SR-198.
State Route 178, a minor arterial connector, starts at Interstate 15's southbound ramp for exit 248, a diamond interchange. The route proceeds east on 800 South, over the interchange, continuing through Payson until terminatining 1.2miles at SR-198.[1]
State Route 178 was added to the state highway system in 2000 in exchange for transferring ownership of the western portion of SR-147 from the Utah Department of Transportation to the city of Payson, as SR-178 connected to Interstate 15 and would be a more appropriate road for the state highway system.[2] No changes have been made to the highway since.