Template:Population of Michigan cities and counties (1920 Census)

In the 1920 United States census, Michigan was recorded as having a population of 3,668,412, ranking as the seventh most populous state in the country. By 1930, Michigan's population had increased by 32.0% to 4,842,325.

Cities
The following is a list of cities in Michigan with a population of at least 15,000 based on 1920 U.S. Census data. Historic census data from 1910 and 1930 is included to reflect trends in population increases or decreases.

Boom cities of the 1920s
The 1920s saw an explosion of growth in the population of small cities near Detroit, with some communities growing more than three fold. Dearborn was the most extreme case, growing 20-fold from 2,470 to 50,358 persons.

Counties
The following is a list of counties in Michigan with populations of at least 40,000 based on 1920 U.S. Census data. Historic census data from 1910 and 1930 are included to reflect trends in population increases or decreases.