Route 338, or Highway 338, may refer to:
Australia
Canada Manitoba Provincial Road 338 Prince Edward Island Route 338 Quebec Route 338
Hungary Main road 338 (Hungary)
Japan Japan National Route 338
Thailand Highway 338 (Thailand)
United Kingdom A338 road, Bournemouth, Dorset to Besselsleigh
United States Georgia State Route 338 Kentucky Route 338 Maryland Route 338 (former) Nevada State Route 338 New Mexico State Road 338 New York: New York State Route 338 (disambiguation) County Route 338 (Erie County, New York) County Route 338 (Saratoga County, New York) County Route 338 (Wayne County, New York) Ohio State Route 338 (former) Ohio State Route 338J (former) Pennsylvania Route 338 Puerto Rico Highway 338 Tennessee State Route 338 Texas: Texas State Highway 338 Texas State Highway Loop 338 Virginia State Route 338 Wyoming Highway 338