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
- China National Highway 309
Costa Rica
- National Route 309
India
- National Highway 309
Japan
- Japan National Route 309
United Kingdom
- A309 road, Twickenham to Hook, London
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
- * County Route 309
- Ohio State Route 309
- * Ohio State Route 309
- Pennsylvania Route 309
- *