Route 340
Route information
Maintained by New Brunswick Department of Transportation
Major junctions
East end	Route 11 in Janeville
West end	Route 135 in Hautes-Terres
Location
Country	Canada
Province	New Brunswick
Major cities	Canobie, Canobie South, Rocheville, Notre-Dame-des-Erables, Haut-Paquetville
Highway system
Provincial highways in New Brunswick Former routes
← Route 335 → Route 345

Route 340 is a 40-kilometre (25 mi) long, mainly east/west secondary highway in the north-eastern portion of New Brunswick, Canada.

The route's western terminus is in the community of Janeville. The road travels south-east to the community of Canobie. Passing the community, the highway takes a 90 degree turn south passing the community of Canobie South. The highway takes a 45 degree turn and travels to the community of Rocheville before taking another turn south then another turn east going towards Notre-Dame-des-Erables, Haut-Paquetville, and eventually Hautes-Terres. There are no river crossings or intersecting routes.

• List of New Brunswick provincial highways