List of highways numbered 309
The following highways are numbered 309:
Canada
- Manitoba Provincial Road 309
- Nova Scotia Route 309
- Prince Edward Island Route 309
- Quebec Route 309
- Saskatchewan Highway 309
China
Costa Rica
India
Japan
United Kingdom
United States
- U.S. Route 309
- Arkansas Highway 309
- Connecticut Route 309
- Florida State Road 309
- Georgia State Route 309
- Kentucky Route 309
- Louisiana Highway 309
- Maryland Route 309
- Minnesota State Highway 309
- Mississippi Highway 309
- New Mexico State Road 309
- New York:
- * New York State Route 309
- * County Route 309 (Erie County, New York)
- * County Route 309 (Westchester County, New York)
- Ohio State Route 309
- * Ohio State Route 309
- Pennsylvania Route 309
- *