Clarence-Rockland is a bilingual city in eastern Ontario, Canada, in the United Counties of Prescott and Russell on the Ottawa River. Clarence-Rockland is located immediately to the east of Ottawa and is considered part of Canada's National Capital Region.

The city is 68 per cent francophone, and is the second largest majority-francophone city in North America outside of Quebec, behind only Edmundston, New Brunswick. (There are higher numbers of francophones in other Canadian cities such as Ottawa (122,665), Sudbury (45,420), Toronto (34,900), Winnipeg (26,855), Moncton (20,425) and Timmins (17,390), but French speakers in these cities are a minority.) In January, 2005, the city introduced a bylaw which required all new businesses to put up signs in both English and French.

The city of Clarence-Rockland was one of the first municipalities after Ottawa to introduce a smoking bylaw in all public establishments. This initiative has led other municipalities in the area to consider such a bylaw.