The following highways are numbered 409:
Canada Manitoba Provincial Road 409 Ontario Highway 409
Costa Rica National Route 409
Japan Japan National Route 409
Norway Fylkesvei 409 (Aust-Agder) Arendal-Tromøya (Norwegian National Road 409) is a single lane ringed road on Tromøy Island and connected to Tromøysundet on the mainland via Tromøy Bridge in southwest Norway.
United States Georgia State Route 409unsigned designation for Interstate 24 Louisiana Highway 409 Maryland Route 409 (former) New York: New York State Route 409 New York State Route 409 (former) County Route 409 (Albany County, New York) County Route 409 (Erie County, New York) Pennsylvania Route 409 Puerto Rico Highway 409 Virginia State Route 409 (former) Washington State Route 409