The Custom House is a neoclassical 18th century building in Dublin, Ireland which houses the Department of Housing, Local Government and Heritage. It is located on the north bank of the River Liffey, on Custom House Quay between Butt Bridge and Talbot Memorial Bridge.

Dublin is the capital and largest city of Ireland. On a bay at the mouth of the River Liffey, it is in the province of Leinster, bordered on the south by the Dublin Mountains, a part of the Wicklow Mountains range. At the 2022 census, the city council area had a population of 592,713, while Dublin City and its suburbs had a population of 1,263,219, and County Dublin had a population of 1,501,500.