| Province: | QC |
| Type: | QC |
| Route: | 315 |
| Maint: | Transports Québec |
| Map: | Route 315-QC.png |
| Length Km: | 76.6 |
| Length Round: | 1 |
| Length Ref: | [1] |
| Direction B: | North |
| Direction A: | South |
| Terminus B: | in Namur |
| Terminus A: | in Gatineau (Masson-Angers) |
| Previous Type: | QC |
| Previous Route: | 311 |
| Next Type: | QC |
| Next Route: | 317 |
| Counties: | Gatineau / Papineau |
| Cities: | Gatineau |
| Junction: | in Gatineau (Masson-Angers) in Gatineau (Buckingham) in Chénéville |
Route 315 is a road in the Canadian province of Quebec that connects the Gatineau sector of Masson-Angers to Namur. Initially, the road started in Buckingham on Rue Joseph at the city's Main Street (Avenue de Buckingham) just a few kilometres further north, but when A-50 was extended further east as a Buckingham by-pass at its current end at Doherty Road, the section of Route 309 between Buckingham and the junction at Route 148 in Masson-Angers was renumbered Route 315 while Route 309 starts at Doherty Road and A-50.
The section of Route 315 between Mulgrave-et-Derry and Ripon is unpaved and windy.
| RCM or ET | Municipality | km | Junction | Notes | |
|---|---|---|---|---|---|
| Gatineau | Masson-Angers | 0.0 | 148 WEST: to Gatineau 148 EAST: to Lochaber-Partie-Ouest | ||
| 0.6 1.9 | 50 EAST: to Buckingham 50 WEST: to Gatineau | ||||
| Buckingham | 8.2 | 309 SOUTH: to 309 NORTH: to L'Ange-Gardien | |||
| Papineau | Ripon | 48.7 | Chemin Montpellier | EAST: to | |
| Chénéville | 65.1 | 321 SOUTH: to Ripon 321 NORTH: to Duhamel | |||
| Namur | 76.6 | ||||