Olderfleet Castle

54°50′34″N 5°48′03″W / 54.84280°N 5.80080°W / 54.84280; -5.80080

Olderfleet Castle is a four-storey towerhouse, the remains of which stand on Curran Point to the south of Larne Harbour in Larne, County Antrim, Northern Ireland. The place name of Olderfleet may be a corruption of Ulfrecksfiord (or Ulfried's Fjord), the Viking name for Larne Lough.

Olderfleet Castle is a State Care Historic Monument in the townland of Curran and Drumaliss, in the former Larne Borough Council area, at grid ref: D4133 0166.