North America metropolitan area by population in North America: Greater Mexico City. Canada also breaks into the top ten largest metropolitan areas with the Toronto metropolitan area having six million people. The proximity of cities to each other on the Canada–United States border and Mexico–United States border has led to the rise of international metropolitan areas. These urban agglomerations are observed at their largest and most productive in Detroit–Windsor and San Diego–Tijuana and experience large commercial, economic, and cultural activity. The metropolitan areas are responsible for millions of dollars of trade dependent on international freight. In Detroit-Windsor the Border Transportation Partnership study
Watford City, North Dakota Watford City, North Dakota Watford City (Hidatsa: abaʔaruʔush), founded in 1914, is a city in and the county seat of McKenzie County, North Dakota, United States. The population was 1,744 at the 2010 census. and the Census Bureau gave the 2017 estimated population as 6,523, making Watford City the twelfth largest city in North Dakota. Because Watford City is part of the Bakken field, the North Dakota oil boom has significantly increased population and construction since the 2010 census. The main offices of Frontier Energy Group, First International Bank, and the headquarters of McKenzie Electric Cooperative are in Watford City.