List of highways numbered 405

Route 405 or Highway 405 may refer to:

Canada

• Manitoba Provincial Road 405
• Newfoundland and Labrador Route 405
• Ontario Highway 405

Japan

• Japan National Route 405

United Kingdom

• A405 road

United States

• Interstate 405
• Florida:
  • Florida State Road 405
  • County Road 405 (Brevard County, Florida)
• Georgia State Route 405 (unsigned designation for Interstate 95)
• Maryland Route 405
• New York:
  • New York State Route 405 (former)
  • County Route 405 (Albany County, New York)
  • County Route 405 (Erie County, New York)
• Pennsylvania Route 405
• Virginia State Route 405