Britannia (also known as Britannia Bay or Britannia Village) is a group of neighbourhoods in Bay Ward in the west end of Ottawa, Ontario, Canada. It is located on the Ottawa River across from Aylmer, Quebec, adjacent to its namesake, Britannia Bay, north of Carling Avenue and west of the Sir John A. Macdonald Parkway. The area constituted a municipal ward from 1973 to 1994 (Britannia Ward).

The area has a mix of low and high income housing. The lower income areas of the area are closer to Richmond Road in the south, and the more affluent areas are located in the community of Britannia Village in the north, which includes the Britannia Yacht Club at the north end of Britannia Road. The total population of the area was 8,355 as of the 2011 census.

Many of Britannia’s old cottages live on as bungalows. Surrounded by water, forest, and hills.

The Ottawa River Pathway is a very long segment of Capital Pathway along the south bank of almost the entire length Ottawa’s portion of the Ottawa River. A bike path extends from Britannia some 12 kilometers to the Parliament buildings downtown. Today, there is probably no neighbourhood in Ottawa more mixed than Britannia forming a contrast with many of the homogenized satellite communities that have become Ottawa.