Largest Counties in Michigan

Rank County Population County Seat Established Area (km2) Density
1 Wayne County 1,820,573 Detroit 1815 1,740 1,046.31
2 Oakland County 1,202,351 Pontiac 1819 2,352 511.2
3 Macomb County 840,967 Mount Clemens 1818 1,476 569.76
4 Kent County 602,611 Grand Rapids 1831 2,258 266.88
5 Genesee County 425,779 Flint 1835 1,681 253.29
6 Washtenaw County 344,780 Ann Arbor 1822 1,873 184.08
7 Ingham County 280,884 Mason 1829 1,453 193.31
8 Ottawa County 263,790 Grand Haven 1831 4,227 62.41
9 Kalamazoo County 250,320 Kalamazoo 1829 1,502 166.66
10 Saginaw County 200,158 Saginaw 1822 2,113 94.73
11 Livingston County 180,956 Howell 1833 1,515 119.44
12 Muskegon County 172,177 Muskegon 1859 3,779 45.56
13 St. Clair County 163,029 Port Huron 1820 2,168 75.2
14 Jackson County 160,237 Jackson 1829 1,875 85.46
15 Berrien County 156,802 Saint Joseph 1829 4,095 38.29
16 Monroe County 152,010 Monroe 1817 1,761 86.32
17 Calhoun County 136,135 Marshall 1829 1,860 73.19
18 Allegan County 111,397 Allegan 1831 4,747 23.47
19 Bay County 107,760 Bay City 1857 1,634 65.95
20 Eaton County 107,748 Charlotte 1829 1,500 71.83
21 Lenawee County 99,881 Adrian 1822 1,971 50.68
22 Lapeer County 88,308 Lapeer 1822 1,717 51.43
23 Grand Traverse County 86,975 Traverse City 1851 1,557 55.86
24 Midland County 83,618 Midland 1831 1,368 61.12
25 Van Buren County 76,247 Paw Paw 1829 2,823 27.01
26 Clinton County 75,371 St Johns 1831 1,489 50.62
27 Shiawassee County 70,637 Corunna 1822 1,401 50.42
28 Isabella County 70,300 Mount Pleasant 1831 1,497 46.96
29 Marquette County 67,066 Marquette 1843 8,871 7.56
30 Ionia County 63,894 Ionia 1831 1,502 42.54
31 Montcalm County 63,331 Stanton 1831 1,867 33.92
32 St. Joseph County 61,284 Centreville 1829 1,349 45.43
33 Barry County 59,162 Hastings 1829 1,494 39.6
34 Tuscola County 55,718 Caro 1840 2,367 23.54
35 Cass County 52,282 Cassopolis 1829 1,316 39.73
36 Newaygo County 48,449 White Cloud 1840 2,230 21.73
37 Hillsdale County 46,677 Hillsdale 1829 1,572 29.69
38 Branch County 45,237 Coldwater 1829 1,344 33.66
39 Sanilac County 43,103 Sandusky 1822 4,118 10.47
40 Mecosta County 42,787 Big Rapids 1840 1,479 28.93
41 Gratiot County 42,465 Ithaca 1831 1,481 28.67
42 Chippewa County 38,509 Sault Ste Marie 1827 6,988 5.51
43 Delta County 37,058 Escanaba 1843 5,159 7.18
44 Houghton County 36,617 Houghton Lake 1845 3,890 9.41
45 Huron County 33,107 Bad Axe 1840 5,532 5.98
46 Wexford County 32,724 Cadillac 1840 1,492 21.93
47 Emmet County 32,683 Petoskey 1840 2,284 14.31
48 Clare County 30,915 Harrison 1840 1,489 20.76
49 Alpena County 29,587 Alpena 1840 4,390 6.74
50 Mason County 28,694 Ludington 1840 3,217 8.92
51 Oceana County 26,559 Hart 1831 3,385 7.85
52 Dickinson County 26,157 Iron Mountain 1891 2,012 13
53 Cheboygan County 26,141 Cheboygan 1840 2,292 11.41
54 Charlevoix County 25,938 Charlevoix 1869 3,603 7.2
55 Iosco County 25,876 Tawas City 1840 4,898 5.28
56 Gladwin County 25,681 Gladwin 1831 1,336 19.22
57 Manistee County 24,722 Manistee 1840 3,318 7.45
58 Roscommon County 24,438 Roscommon 1840 1,502 16.27
59 Otsego County 24,153 Gaylord 1840 1,362 17.73
60 Menominee County 24,018 Menominee 1861 3,465 6.93
61 Antrim County 23,587 Bellaire 1840 1,559 15.13
62 Osceola County 23,517 Reed City 1840 1,484 15.85
63 Leelanau County 21,697 Suttons Bay 1840 6,558 3.31
64 Ogemaw County 21,688 West Branch 1840 1,489 14.57
65 Benzie County 17,514 Beulah 1863 2,227 7.86
66 Kalkaska County 17,142 Kalkaska 1840 1,479 11.59
67 Gogebic County 16,416 Bessemer 1887 3,823 4.29
68 Arenac County 15,888 Standish 1831 1,764 9.01
69 Missaukee County 14,838 Lake City 1840 1,487 9.98
70 Crawford County 14,063 Grayling 1840 1,458 9.65
71 Presque Isle County 13,365 Rogers City 1840 6,664 2.01
72 Iron County 11,806 Crystal Falls 1885 3,136 3.76
73 Lake County 11,528 Baldwin 1840 1,489 7.74
74 Mackinac County 11,102 Saint Ignace 1818 5,442 2.04
75 Alcona County 10,931 Harrisville 1840 4,639 2.36
76 Montmorency County 9,754 Atlanta 1840 1,456 6.7
77 Alger County 9,590 Munising 1885 13,077 0.73
78 Baraga County 8,849 L’Anse 1875 2,769 3.2
79 Oscoda County 8,629 Mio 1840 1,481 5.83
80 Schoolcraft County 8,474 Manistique 1843 4,880 1.74
81 Ontonagon County 6,769 Ontonagon 1843 9,689 0.7
82 Luce County 6,620 Newberry 1887 4,952 1.34
83 Keweenaw County 2,145 Eagle River 1861 15,452 0.14

Largest Counties in Michigan

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