List of highways 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
• ** New York State Route 339
• * 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

• Puerto Rico Highway 339