A33, A 33 or A-33 may refer to :

  • Douglas A-33, a 1941 American ground-attack fighter aircraft
  • A33 Excelsior British heavy tank prototype
  • HLA-A33, a human serotype
  • Samsung Galaxy A33 5G, an Android smartphone

and also :

  • One of the Encyclopaedia of Chess Openings codes for the English Opening in chess

Roads

  • A33 road (England), a road connecting Reading and Southampton
  • A33 motorway (France), a road connecting Nancy and Dombasle-sur-Meurthe
  • A 33 motorway (Germany), a road connecting the A 30 in the north and the A 44 in the south
  • A33 motorway (Italy), a road under construction connecting Asti and Cuneo
  • A33 motorway (Spain), a proposed road in Murcia connecting Cieza and Font de la Figuera
  • A33 road (Sri Lanka), a road connecting Ja Ela-Ekala-Gampaha-Yakkala
  • A33 road (Botswana), a road in Botswana.