List of highways numbered 421

The following highways are numbered 421:

Canada[]

• Newfoundland and Labrador Route 421

Japan[]

• Japan National Route 421

United States[]

• U.S. Route 421
• Florida State Road 421
  • County Road 421 (Volusia County, Florida)
• Georgia State Route 421 (unsigned designation for Interstate 516)
• New Mexico State Road 421
• New York State Route 421
• Ohio State Route 421
• 
• South Carolina Highway 421
• Tennessee State Route 421
• Texas State Highway Spur 421

This list is incomplete; you can help by . (August 2008)

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