SIAT

SIAT may refer to:


 * S.I.A.T. (Sociedad Ibérica de Automóviles de Turismo), the predecessor company of the Spanish car maker SEAT (S.E.A.T., Sociedad Española de Automóviles de Turismo)
 * Siebelwerke/ATG, a German aircraft manufacturer
 * Sibaviatrans, a Russian airline
 * N-acetyllactosaminide alpha-2,3-sialyltransferase, an enzyme
 * SIAT station, metro station in Guangming District, Shenzhen, Guangdong Province, China