The following highways are numbered 339:
Canada Prince Edward Island Route 339 Quebec Route 339 Saskatchewan Highway 339
India National Highway 339 (India)
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 (former) New York State Route 339 (former) County Route 339 (Saratoga County, New York) 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 Territories Puerto Rico Highway 339