Holy Trinity Church is an Episcopalian church building in Dunoon, Argyll and Bute, Scotland. It is located on Kilbride Road, southwest of the town centre. Constructed in the Gothic revival style, it is a Category B listed building. The church was built in 1850 by John Henderson. It was extended to the west in 1896 by Alexander Ross. Its bell was cast by John Warner & Sons. Its current rector is Revd. David Railton.