Population of Counties in Michigan (2021)

The most populous county in Michigan in 2019 is Wayne County, home to Detroit, with a population of 1,753,616. This represents a growth rate of -3.39% since the 2010 census. Michigan is home to three other counties with more than 500,000 residents: Oakland (1,250,836), Macomb County (871,375), and Kent County (648,594). Of these, Kent County has experienced the highest population growth rate of 7.58%.

Michigan Counties with Fewest Residents

The least populous county in Michigan is Keweenaw County with a population of just 2,105, a growth rate of -2.95%. Michigan is home to 8 counties with a population of less than 10,000. Other small Michigan counties include Ontonagon County (5,881), Luce County (6,358), Schoolcraft County (8,049), Oscoda County (8,287), and Baraga County (8,441). All of these counties have experienced a decline in population. Ontonagon County has experienced the most dramatic population growth of -13.21%.

Michigan Counties with Rapid Growth

Ottawa County, the 8th largest county in Michigan, has experienced the largest population growth in Michigan at 8.44% since the census, bringing its population to 286,383. After Ottawa County, other counties that have experienced rapid growth include Kent County (7.58%), Washtenaw County (6.40%), and Grand Traverse County (5.56%). The county with the largest decline in population is Ontonagon County with a drop of 13.21%.

Name 2021 Population Growth Since 2010 Density (mi²)
Wayne County1,739,120-4.18%3,629.86
Oakland County1,259,3604.68%2,628.51
Macomb County876,3264.16%1,829.05
Kent County664,16510.15%1,386.23
Genesee County404,063-4.92%843.35
Washtenaw County363,8375.24%759.39
Ottawa County295,87412.02%617.54
Ingham County293,9944.58%613.62
Kalamazoo County265,8386.02%554.85
Livingston County193,6056.92%404.09
Saginaw County190,035-4.92%396.64
Muskegon County173,5000.92%362.13
St. Clair County159,322-2.07%332.53
Jackson County158,398-1.07%330.61
Berrien County152,623-2.62%318.55
Monroe County151,152-0.52%315.48
Calhoun County134,379-1.16%280.47
Allegan County119,8977.51%250.25
Eaton County111,3843.38%232.48
Bay County101,974-5.30%212.84
Lenawee County99,071-0.57%206.78
Grand Traverse County94,2048.32%196.62
Lapeer County86,979-1.40%181.54
Midland County83,022-0.75%173.28
Clinton County80,3476.56%167.70
Van Buren County76,069-0.11%158.77
Isabella County68,690-2.28%143.37
Shiawassee County68,100-3.59%142.14
Marquette County67,3350.38%140.54
Ionia County65,5392.66%136.79
Montcalm County63,7920.75%133.15
Barry County62,1885.23%129.80
St. Joseph County61,068-0.36%127.46
Cass County51,911-0.64%108.35
Tuscola County51,469-7.59%107.43
Newaygo County49,2621.84%102.82
Hillsdale County45,411-2.65%94.78
Mecosta County43,5591.65%90.92
Branch County43,419-3.88%90.62
Sanilac County41,126-4.55%85.84
Gratiot County40,929-3.54%85.43
Chippewa County37,125-3.86%77.49
Delta County35,666-3.73%74.44
Houghton County35,166-4.26%73.40
Wexford County34,0013.85%70.97
Emmet County33,7953.51%70.54
Clare County31,3801.21%65.50
Huron County30,521-7.74%63.70
Mason County29,2641.90%61.08
Alpena County28,447-3.60%59.37
Oceana County26,291-0.80%54.87
Charlevoix County26,0550.46%54.38
Gladwin County25,695-0.16%53.63
Iosco County25,175-2.57%52.54
Dickinson County24,975-4.52%52.13
Cheboygan County24,820-4.77%51.80
Manistee County24,7640.72%51.69
Otsego County24,7222.36%51.60
Roscommon County24,433-0.04%51.00
Osceola County23,6260.53%49.31
Antrim County23,326-0.70%48.69
Menominee County22,486-6.18%46.93
Leelanau County21,8550.63%45.62
Ogemaw County21,227-1.75%44.30
Kalkaska County18,5027.91%38.62
Benzie County17,7761.55%37.10
Missaukee County15,1522.27%31.62
Arenac County14,633-7.69%30.54
Crawford County14,2771.58%29.80
Presque Isle County12,380-7.04%25.84
Lake County11,8072.54%24.64
Gogebic County11,693-28.68%24.41
Iron County10,990-6.94%22.94
Mackinac County10,835-2.46%22.61
Alcona County10,495-3.53%21.90
Montmorency County9,434-3.51%19.69
Alger County9,088-5.14%18.97
Oscoda County8,275-3.79%17.27
Schoolcraft County8,194-3.28%17.10
Baraga County7,979-9.95%16.65
Luce County6,033-8.60%12.59
Ontonagon County5,558-17.98%11.60
Keweenaw County2,168-0.05%4.53