| Province: | SK |
| Type: | Hwy |
| Route: | 318 |
| Photo Notes: | Highway 318 north of Carnduff |
| Photo Width: | 250 |
| Length Km: | 27.9 |
| Length Round: | 1 |
| Direction A: | South |
| Terminus A: | at Carnduff |
| Direction B: | North |
| Terminus B: | near Alida |
| Rural Municipalities: | Mount Pleasant No. 2, Reciprocity No. 32 |
| Previous Type: | Hwy |
| Previous Route: | 317 |
| Next Type: | Hwy |
| Next Route: | 320 |
Highway 318 is a provincial highway in the Canadian province of Saskatchewan. It runs from Highway 18 near Carnduff to Highway 361 near Alida. It is about long.