A13 or A-13 may refer to:
Biology ATC code A13 Tonics, a subgroup of the Anatomical Therapeutic Chemical Classification System British NVC community A13 (Potamogeton perfoliatus - Myriophyllum alterniflorum community) Subfamily A13, a rhodopsin-like receptors subfamily
Transportation A13 road, in several countries Archambault A13, a French sailboat design Antonov A-13, a 1958 Soviet acrobatic sailplane Chery A13, a subcompact car , a British A-class submarine of the Royal Navy Northrop YA-13, a 1930s American attack aircraft prototype A-13 (tank), the General Staff specification covering three British cruiser tanks designed and built before and during the Second World War Cruiser Mk III Cruiser Mk IV Covenanter tank
Other uses English Opening in chess (Encyclopaedia of Chess Openings code A13, among others) Apple A13, a system on a chip mobile processor designed by Apple Samsung Galaxy A13, a smartphone manufactured by Samsung Electronics