The following highways are numbered 404:
Australia - Victoria
Canada Manitoba Provincial Road 404 Newfoundland and Labrador Route 404 Ontario Highway 404
Costa Rica National Route 404
Israel Route 404 (Israel)
Japan Japan National Route 404
United Kingdom A404 road London - Maidenhead A404(M) Berkshire
United States Delaware Route 404 Delaware Route 404 Alternate (former) Delaware Route 404 Business Delaware Route 404 Truck Florida State Road 404 Georgia State Route 404 (unsigned designation for Interstate 16) Georgia State Route 404 Spur Iowa Highway 404 (unsigned designation for U.S. Route 75 Business) Maryland Route 404 Maryland Route 404 Alternate Maryland Route 404 Business New Mexico State Road 404 New York: New York State Route 404 New York State Route 404 (former) County Route 404 (Albany County, New York) County Route 404 (Erie County, New York) Puerto Rico Highway 404 Texas: Texas State Highway Loop 404 Farm to Market Road 404 (former) Virginia State Route 404