List of highways numbered 404

The following highways are numbered 404:

Australia
- Victoria

Canada

 * Manitoba secondary 404.svg Manitoba Provincial Road 404
 * NL Route 404.svg Newfoundland and Labrador Route 404
 * Ontario 404.svg Ontario Highway 404

Costa Rica

 * CR RNT 404.svg National Route 404

Israel

 * ISR-HW-404.svg Route 404 (Israel)

Japan

 * Japanese National Route Sign 0404.svg Japan National Route 404

United Kingdom

 * UK road A404.svg A404 road London - Maidenhead
 * UK-Motorway-A404(M).svg A404(M) Berkshire

United States

 * Ellipse sign 404.svg Delaware Route 404
 * Delaware Route 404 Alternate (former)
 * Delaware Route 404 Business
 * Delaware Route 404 Truck
 * Florida 404.svg Florida State Road 404
 * Georgia 404.svg Georgia State Route 404 (unsigned designation for Interstate 16)
 * Georgia 404 Spur.svg Georgia State Route 404 Spur
 * Iowa 404.svg Iowa Highway 404 (unsigned designation for U.S. Route 75 Business)
 * MD Route 404.svg Maryland Route 404
 * Maryland Route 404 Alternate
 * MD Route 404 Business.svg Maryland Route 404 Business
 * New Mexico 404.svg New Mexico State Road 404
 * New York:
 * NY-404.svg New York State Route 404
 * New York State Route 404 (former)
 * County Route 404 (Albany County, New York)
 * Erie County 404 NY.svg County Route 404 (Erie County, New York)
 * Ellipse sign 404.svg Puerto Rico Highway 404
 * Texas:
 * Texas Loop 404.svg Texas State Highway Loop 404
 * Texas FM 404.svg Farm to Market Road 404 (former)
 * Virginia 404.svg Virginia State Route 404