Template:Population of Michigan cities and counties (1940 Census)

In the 1940 United States census, Michigan was recorded as having a population of 5,256,106, ranking as the seventh most populous state in the country. By 1950, Michigan's population had increased by 21.2% to 6,371,766.

Cities
The following is a list of cities in Michigan with a population of at least 20,000 based on 1940 U.S. Census data. Historic census data from 1930 and 1950 is included to reflect trends in population increases or decreases. Cities that are part of the Detroit metropolitan area are shaded in tan.

Counties
The following is a list of counties in Michigan with populations of at least 75,000 based on 1940 U.S. Census data. Historic census data from 1930 and 1950 are included to reflect trends in population increases or decreases.