{{redirect|Slains|text=Slains also refers to the parish in which the castle stands}} '''Slains Castle''' may refer to one of two ruined castles in Aberdeenshire, Scotland:

*Old Slains Castle, a 13th-century castle was originally the property of the Comyn Earls of Buchan, near Collieston *New Slains Castle, a 16th-century tower house, built by the 9th Earl of Erroll, overlooking the North Sea from its cliff-top site 1 kilometre (0.62 mi) east of Cruden Bay

== Ships == * ''Slains Castle'', a ship chartered by the New Zealand Company in the 1840s

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