Cape Breton Regional Municipality (2006 population: 102,250), often shortened to simply CBRM, is a regional municipality in Nova Scotia's Cape Breton County.
Its population makes it the second largest municipality in the province and the population of the former city of Sydney (33,012) also gives CBRM the distinction of having the province's third largest urban centre.
In 1995 the government of Nova Scotia sought to reduce the number of incorporated towns and cities in the province through amalgamation. CBRM was created from the former municipalities, the City of Sydney; the Towns of Dominion, Glace Bay, New Waterford, North Sydney, Sydney Mines, Louisbourg, and the Municipality of the County of Cape Breton.