The Church of the Assumption, Howth is a Roman Catholic church in Howth, in Fingal in the traditional County Dublin.
The church is situated at the junction of Thormanby Road and Main Street, Howth, with St. Mary's Road, a short road joining the other two roads, behind. The roof is double pitched slate with decorative terracotta ridge tiles and cast iron rainwater goods. The walls are rockfaced granite with a limestone plinth, gargoyles and early Irish stone crosses.