| Province: | QC |
| Type: | QC |
| Route: | 335 |
| Maint: | Transports Québec |
| Map: | Route 335-QC.png |
| Photo Notes: | Route 335 south as Laurentides boulevard in Pont-Viau, Laval. |
| Length Km: | 85.5 |
| Length Round: | 1 |
| Direction A: | South |
| Terminus A: | in Montréal |
| Junction: | in Montréal in Laval in Bois-des-Filion in Saint-Lin-Laurentides |
| Direction B: | North |
| Terminus B: | in Chertsey |
| Previous Type: | QC |
| Previous Route: | 333 |
| Next Type: | QC |
| Next Route: | 337 |
| Cities: | Montreal, Laval, Terrebonne |
Route 335 is a north-south regional route located on the north shore of the St. Lawrence River. from Montreal It serves the administrative regions of Montreal, Laval, Laurentides, and Lanaudière. It is the only secondary road whose route crosses the Island of Montreal. Between Autoroute 440 in Laval and Côte-Saint-Louis Road in Terrebonne, Route 335 is located in the right-of-way of the future Autoroute 19.
Route 335 begins in Montreal at Sherbrooke Street (Route 138) and follows Saint Denis Street. North of the Autoroute 40, Route 335 splits to a one-way pair, following Berri Street southbound and Lajeunesse Street northbound, and then crosses the Viau Bridge over Rivière des Prairies to Laval. It follows Laurentian Boulevard to Autoroute 440 on Laurentian Boulevard. Route 335 once followed the entire length of Laurentian Boulevard to the David Bridge on the Rivière des Mille Îles, but now concurrently with Autoroute 440 for about 1.5abbr=onNaNabbr=on to Autoroute 19. Between Autoroute 440 and Dagenais Boulevard, it is co-signed with Autoroute 19, and continues on the Autoroute 19 right-of-way. North of the bridge, the Route 335 once ran along Montée Gagnon from Route 344 northwards, but now follows the Autoroute 19 right-of-way along Louis-Joseph-Papineau Boulevard to Côte-Saint-Louis Road East (French: chemin de la Côte-St-Louis est). North of French: chemin de la Côte-St-Louis est, Route 335 runs along French: Montée Gagnon and its historic route.
Formerly Route 65, it was an alternative to Routes 11 and 18.
There are plans to extend Autoroute 19 along Route 335 to Autoroute 640 in Bois-des-Filion with anticipated completion in 2027, with the first phase being extension and an interchange at Rue Saint-Saëns. The project includes four new interchanges, reconstruction of the Autoroute 640 interchange, and twinning the Athanase David Bridge.[1] [2]