| Province: | NS |
| Type: | Route |
| Route: | 309 |
| Length Km: | 29 |
| Length Round: | 0 |
| Length Ref: | [1] |
| Direction A: | West |
| Direction B: | East |
| Terminus A: | in Barrington |
| Terminus B: | in Clyde River |
| Counties: | Shelburne |
| Previous Type: | Route |
| Previous Route: | 308 |
| Next Type: | Route |
| Next Route: | 311 |
Route 309 is a collector road in the Canadian province of Nova Scotia.
It is located in Shelburne County and connects Barrington at Trunk 3/Highway 103 with Clyde River at Trunk 3/Highway 103.