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.

1940 Rank	City	County	1940 Pop.	1946 Est.	1950 Pop.	Change 1940-50
1	Detroit	Wayne	1,623,452	1,815,000	1,849,568	13.9%
2	Grand Rapids	Kent	164,292		176,515	7.4%
3	Flint	Genesee	151,543		163,143	7.7%
4	Saginaw	Saginaw	82,794		92,918	12.2%
5	Lansing	Ingham	78,753	90,000	92,129	17.0%
6	Pontiac	Oakland	66,626		73,681	10.6%
7	Dearborn	Wayne	63,589		94,994	49.4%
8	Kalamazoo	Kalamazoo	54,097		57,704	6.7%
9	Highland Park	Wayne	50,810		46,393	−8.7%
10	Hamtramck	Wayne	49,839	48,938	43,555	−12.6%
11	Jackson	Jackson	49,656		51,088	2.9%
12	Bay City	Bay	47,956		52,523	9.5%
13	Muskegon	Muskegon	47,697		48,429	1.5%
14	Battle Creek	Calhoun	43,453		48,666	12.0%
15	Port Huron	St. Clair	32,759		35,725	9.1%
16	Wyandotte	Wayne	30,618		36,846	20.3%
17	Ann Arbor	Washtenaw	29,815		48,251	61.8%
18	Royal Oak	Oakland	25,087		46,898	86.9%
19	Ferndale	Oakland	22,523		29,675	31.8%

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.

1940 Rank	County	Largest city	1930 Pop.	1940 Pop.	1950 Pop.	Change 1940-50
1	Wayne	Detroit	1,888,946	2,015,623	2,435,235	20.8%
2	Oakland	Pontiac	211,251	254,068	396,001	55.9%
3	Kent	Grand Rapids	240,511	246,338	288,292	17.0%
4	Genesee	Flint	211,641	227,944	270,963	18.9%
5	Ingham	Lansing	116,587	130,616	172,941	32.4%
6	Saginaw	Saginaw	120,717	130,468	153,515	17.7%
7	Macomb	Warren	77,146	107,638	184,961	71.8%
8	Kalamazoo	Kalamazoo	91,368	100,085	126,707	26.6%
9	Jackson	Jackson	92,304	93,108	108,168	16.2%
10	Muskegon	Muskegon	84,630	94,501	121,545	28.6%
11	Calhoun	Battle Creek	87,043	94,206	120,813	28.2%