Montreal-Ottawa Corridor

The Montréal-Ottawa Corridor is a heavily populated region in both Ontario and Quebec. It is an east-west corridor with the eastern end being Greater Montréal and the western end being Ottawa-Gatineau. It is a sub-region of the Quebec City-Windsor Corridor. The Montréal-Ottawa Corridor includes the major centres of Montréal, Ottawa, Laval, Gatineau, and Cornwall and has a population of 5,700,000 (2020 estimate), comprising roughly 15% of Canada's population.

The term was coined recently as the metropolitan areas of Greater Montréal and Ottawa-Gatineau continue to expand towards each other, thus decreasing the rural gap between them. Commuting between the cities continues to increase as the drive is usually less than 2 hours long (relatively very short for two large cities in Canada), in addition to the Montréal-Ottawa-Toronto train and flight corridor being the busiest in Canada. Despite this expansion, there still exists significant rural areas between the cities, however towns of over 1,000 people are very common in this gap.

Ontario

 * Ottawa (formerly Ottawa-Carleton Regional Municipality)
 * Prescott and Russell
 * Stormont, Dundas and Glengarry

Quebec

 * Communauté métropolitaine de Montréal (English: Greater Montreal)
 * Gatineau (formerly Communauté-Urbaine-de-l'Outaouais [English: Outaouais Urban Community]
 * Papineau
 * Les Collines-de-L'outaouais

Major centers in the Montreal-Ottawa Corridor
Population figures are as of at least 2020 (if available) and are rounded to the half-thousand

Ontario

 * Ottawa: 1,000,000
 * Cornwall: 46,500
 * Clarence-Rockland: 24,500
 * Russell: 16,500
 * Hawkesbury: 10,500
 * Embrun: 9,000

Quebec

 * Island of Montréal: 1,942,000
 * Laval: 423,000
 * Gatineau: 276,000
 * Blainville: 56,500
 * Salaberry-de-Valleyfield: 42,500
 * Vaudrueil-Dorion: 38,000
 * St. Lazare: 20,000
 * L'Île-Perrot: 11,000
 * Rigaud: 7,500