Acasta may refer to:
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''Acasta'' (crustacean), a genus of barnacles
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HMS ''Acasta'', various ships
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''Acasta''-class destroyers, First World War ships
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Acasta Gneiss
The Acasta Gneiss Complex, also called the Acasta Gneiss, is a body of felsic to Ultramafic rock, ultramafic Archean Basement (geology), basement rocks, gneisses, that form the northwestern edge of the Slave craton, Slave Craton in the Northwes ...
, Canadian rock body
{{disambiguation