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
See also
*
Siat, a former municipality of Switzerland
*
Siats
''Siats'' (/see-ats/) is an extinct genus of large theropod dinosaur known from the Late Cretaceous Cedar Mountain Formation of Utah, United States. It contains a single species, ''Siats meekerorum''. It was initially classified as a megaraptor ...
, a genus of dinosaurs
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