| Province: | SK |
| Type: | Hwy |
| Route: | 320 |
| Photo Width: | 250 |
| Length Km: | 26.2 |
| Length Round: | 1 |
| Direction A: | West |
| Terminus A: | near Domremy |
| Direction B: | East |
| Terminus B: | near Crystal Springs |
| Rural Municipalities: | St. Louis, Invergordon |
| Previous Type: | Hwy |
| Previous Route: | 318 |
| Next Type: | Hwy |
| Next Route: | 321 |
Highway 320 is a provincial highway in the Canadian province of Saskatchewan. It runs from Highway 2 near Domremy to Highway 20 near Crystal Springs. The highway also passes near the community of Northern Light. It is about long.