Laurier House, National Historic Site in Sandy Hill, Ottawa, Canada

Laurier House is a National Historic Site at 335 Laurier Avenue East in Ottawa's Sandy Hill district. Built in 1878 and later altered, it shows Italianate and Second Empire elements. It served as the residence of Prime Ministers Sir Wilfrid Laurier and William Lyon Mackenzie King, and is now a historic house museum.

The house was built in 1878 and became the home of Prime Minister Sir Wilfrid Laurier in 1897. After his death in 1919, it passed to Prime Minister William Lyon Mackenzie King, who lived there until 1950.

The house shows how two leading Canadian Prime Ministers of the 20th century lived and furnished their home. The rooms offer a personal glimpse into their daily surroundings and lifestyle.

The house is open mainly during the warmer months and is visited through guided tours that take you room by room. It is worth setting aside enough time, as each room contains many small details that are easy to miss.

The house was briefly considered as the permanent official residence of the prime minister, but Louis St. Laurent opposed the idea, and 24 Sussex Drive was designated instead in 1951. In 2022 a memorial plaque was installed here to Canada's first code-breaking unit.