North America isn't actually actually a country. Presumably you mean the U.S, which has the third highest population, but a long way behind China and India. If you did mean continents, no it's one of the lowest.
It IS the most populated city in North America because 19,028,000 people live there.
cause
The Mid-Atlantic
The ten most populated countries in the world are located on the continents of Asia, North America, and South America. These countries are China (1,343,239,923 as of 2012), India (1,205,073,612), United States (313,847,465), Indonesia (248,645,008), Brazil (193,946,886), Pakistan (190,291,129), Nigeria (170,123,740), Bangladesh (161,083,804), Russia (142,517,670), and Japan (127,368,088).
The population of North America in 2010 was 542 million people. The most populated country in North America in 2010 was the United States, with 310 million people.
Brazil with a population of 198.7 million is the most populated country in South America. It is followed by Colombia with 43.7 million and Argentina with 40.1 million.
Algeria is the second most highly populated of the North Africa countries (Algeria, Egypt, Libya, Morocco, Sudan, and Tunisia).
Latin America's most populated city is Mexico City. The three most populated cities south of the equator are Buenos Aires, Rio de Janeiro, and Sau Paulo.
Latin America's most populated city is Mexico City. The three most populated cities south of the equator are Buenos Aires, Rio de Janeiro, and Sau Paulo.
Black is the most popular car color in North America.
Asia, Africa, Europe, North America, South America, Australasia, Antarctica
Is Mexico City.