Aylmer is a former city in Quebec, Canada. It is located on the north shore of the Ottawa River and along Route 148. In January 2002, it amalgamated into the city of Gatineau, which is part of Canada's National Capital Region. Aylmer's population in 2011 was 55,113. It is named after Lord Aylmer, who was a governor general of British North America and a lieutenant governor of Lower Canada from 1830 to 1835.

The Ottawa River is a river in the Canadian provinces of Ontario and Quebec. It is named after the Algonquin word 'to trade', as it was the major trade route of Eastern Canada at the time. For most of its length, it defines the border between these two provinces. It is a major tributary of the St. Lawrence River and the longest river in Quebec.