W13 may refer to:
British NVC community W13, one of the woodland communities in the British National Vegetation Classification system Eagle's Nest Airport (Virginia), in Augusta County, Virginia, United States Hansa-Brandenburg W.13, a German flying boat bomber London Buses route W13 Mercedes W13, a racing car Rhombicuboctahedron Route W13 (WMATA), a former bus route in Maryland W-13-class minesweeper of the Imperial Japanese Navy W13 nuclear warhead Watjanti language W13, a postcode district in London, England