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 amalga…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.