A19

A19, A-19, etc. may refer to:


 * A19, one of the Encyclopaedia of Chess Openings codes for the English Opening
 * A19, a 2002 album by the Battlefield Band
 * "A19", a song by Maxïmo Park from the Missing Songs album
 * A19 light bulb, a common household bulb
 * A19 road, a code used to identify a particular road in several countries
 * 122 mm gun M1931/37 (A-19), a Soviet field gun
 * Aero A.19, a 1923 Czech fighter aircraft design
 * Arrows A19, a Formula One car
 * British NVC community A19 (Ranunculus aquatilis community), a plant community
 * HLA-A19, a human serotype
 * Saro A.19 Cloud, a 1930 British flying boat
 * Subfamily A19, a rhodopsin-like receptors subfamily
 * Vultee A-19, a 1939 American attack aircraft