List of highways numbered 404

Canada

• Manitoba Provincial Road 404
• Newfoundland and Labrador Route 404
• Ontario Highway 404

  Costa Rica

• National Route 404

  Israel

• Route 404

  Japan

• Japan National Route 404

  United Kingdom

• A404 road London - Maidenhead
• A404 Berkshire

  United States

• Delaware Route 404
• * Delaware Route 404 Alternate
• * Delaware Route 404 Business
• * Delaware Route 404 Truck
• Florida State Road 404
• Georgia State Route 404
• * Georgia State Route 404 Spur
• Iowa Highway 404
• 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
• * County Route 404
• * County Route 404
• Puerto Rico Highway 404
• Texas:
• Texas State Highway Loop 404
• Farm to Market Road 404
• Virginia State Route 404