| State: | WY |
| Type: | WY |
| Route: | 78 |
| Map Custom: | yes |
| Map Notes: | WYO 78 highlighted in red |
| Alternate Name: | South Higley Boulevard |
| Length Mi: | 1.23 |
| Length Round: | 2 |
| Direction A: | South |
| Terminus A: | Wyoming State Penitentiary in Rawlins |
| Junction: | in Rawlins |
| Direction B: | North |
| Terminus B: | in Rawlins |
| Counties: | Carbon |
| Previous Type: | WY |
| Previous Route: | 77 |
| Next Type: | I |
| Next Route: | 80 |
Wyoming Highway 78 (WYO 78) is a 1.23miles long Wyoming state highway located in Carbon County in the city of Rawlins. The highway runs along a portion of South Higley Boulevard.
Wyoming Highway 78, albeit short in length, serves as a connection between Highway 71, Interstate 80, and U.S. Route 30 at exit 214, and the Wyoming State Penitentiary to the south. Highway 78 begins at the Wyoming State Penitentiary south of Rawlins, and heads north along South Higley Boulevard. Highway 78 intersects I-80 / US 30 at exit 214, and just 0.15miles later terminates at Highway 71.[1]
Mileposts increase from north to south along Highway 78.