The following highways are numbered 415:

Canada

• Manitoba Provincial Road 415
• New Brunswick Route 415
• Newfoundland and Labrador Route 415

Costa Rica

• National Route 415

India

• National Highway 415 (India)

Japan

• Japan National Route 415

United States

• Interstate 415 (former)
• Florida:
  • Florida State Road 415
    • County Road 415 (Volusia County, Florida)
  • Florida State Road 415A (former)
  • County Road 415 (Seminole County, Florida)
• Georgia State Route 415 (unsigned designation for Interstate 520)
• Iowa Highway 415
• Louisiana Highway 415
  • Louisiana Highway 415 Spur
• Maryland Route 415
• New York:
  • New York State Route 415
    • County Route 415 (Steuben County, New York) (former)
  • New York State 415 (former)
• Pennsylvania Route 415
• Puerto Rico Highway 415
• Virginia State Route 415