This is a list of National Historic Sites of Canada (French: Lieux historiques nationaux du Canada) in its capital city, Ottawa, Ontario. There are 25 National Historic Sites in Ottawa, of which two (Laurier House and the Rideau Canal) are administered by Parks Canada (identified below by the beaver icon ). The Rideau Canal, which extends to Lake Ontario at Kingston, was designated in 1925 and was the first site designated in Ottawa.
There are six other National Historic Sites of Canada located within the National Capital Region, but not within Ottawa proper: the Former Almonte Post Office and Rosamond Woollen Mill in Almonte, the Gillies Grove and House in Arnprior, the Manoir Papineau in Montebello, the Symmes Hotel in the Aylmer sector of Gatineau, and the First Geodetic Survey Station in Chelsea.
National Historic Sites located elsewhere in Ontario are listed at List of National Historic Sites of Canada in Ontario.
This list uses names designated by the Historic Sites and Monuments Board of Canada, which may differ from other names for these sites.