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
Costa Rica
- National Route 405
Japan
- Japan National Route 405
United Kingdom
- A405 road
United States
- Interstate 405
- * Interstate 405, a bypass of Los Angeles, California
- * Interstate 405, a bypass of Portland, Oregon
- * Interstate 405, a bypass of Seattle, Washington
- Florida:
- * Florida State Road 405
- * County Road 405
- Georgia State Route 405
- Maryland Route 405
- New York:
- * New York State Route 405
- * County Route 405
- * County Route 405
- Pennsylvania Route 405
- Puerto Rico Highway 405
- Virginia State Route 405