A19, A-19, etc. may refer to:
Arts and media A19, a 2002 album by the Battlefield Band "A19", a song by Maxïmo Park from the Missing Songs album
Science and technology Vehicles Airbus A319, a narrow-body passenger aircraft from the Airbus A320 family Aero A.19, a 1923 Czech fighter aircraft design Arrows A19, a Formula One car Saro A.19 Cloud, a 1930 British flying boat Vultee A-19, a 1939 American attack aircraft
Other uses in science and technology A19 light bulb, a common household bulb 122 mm gun M1931/37 (A-19), a Soviet field gun British NVC community A19 (Ranunculus aquatilis community), a plant community HLA-A19, a human serotype Subfamily A19, a rhodopsin-like receptors subfamily Apple A19, a mobile processor produced by Apple
Other uses English Opening (Encyclopaedia of Chess Openings code A19, among others) A19 road, a code used to identify a particular road in several countries A19 (Xinyi), a shopping mall in Taipei, Taiwan