List of highways numbered 339
The following highways are numbered 339:
Canada
- Prince Edward Island Route 339
- Quebec Route 339
- Saskatchewan Highway 339
India
- National Highway 339
Ireland
- R339 regional road
Japan
- Japan National Route 339
United Kingdom
- A339 road, Alton, Hampshire to Newbury, Berkshire
United States
- Georgia State Route 339
- Louisiana Highway 339
- Nevada State Route 339
- New York:
- * New York State Route 339
- ** New York State Route 339
- * County Route 339
- Ohio State Route 339
- Oregon Route 339
- Pennsylvania Route 339
- Texas State Highway 339
- Virginia State Route 339
- Washington State Route 339
- Wyoming Highway 339