| County | Rank | Change (2020) ↓ | 2026 Pop. | 2020 Pop. |
|---|---|---|---|---|
| Lake County | 1 | 11.45% | 13,483 | 12,098 |
| Montmorency County | 2 | 9.66% | 10,056 | 9,170 |
| Mackinac County | 3 | 6.82% | 11,548 | 10,811 |
| Montcalm County | 4 | 6.63% | 71,080 | 66,659 |
| Alcona County | 5 | 6.49% | 10,846 | 10,185 |
| Otsego County | 6 | 6.14% | 26,679 | 25,135 |
| Kalkaska County | 7 | 6.03% | 19,010 | 17,929 |
| Branch County | 8 | 5.47% | 47,335 | 44,878 |
| Crawford County | 9 | 5.36% | 13,683 | 12,987 |
| Antrim County | 10 | 5.18% | 24,676 | 23,460 |
| Oscoda County | 11 | 4.97% | 8,644 | 8,235 |
| Ottawa County | 12 | 4.94% | 311,555 | 296,899 |
| Mecosta County | 13 | 4.88% | 42,397 | 40,426 |
| Kent County | 14 | 4.6% | 688,788 | 658,524 |
| Oakland County | 15 | 4.28% | 1,326,992 | 1,272,526 |
| Osceola County | 16 | 4.24% | 23,874 | 22,902 |
| Newaygo County | 17 | 4.07% | 52,134 | 50,095 |
| Ingham County | 18 | 3.81% | 295,861 | 285,007 |
| Benzie County | 19 | 3.6% | 18,640 | 17,993 |
| Wexford County | 20 | 3.44% | 34,848 | 33,689 |
| Houghton County | 21 | 3.15% | 38,429 | 37,256 |
| Marquette County | 22 | 3.13% | 68,629 | 66,544 |
| Keweenaw County | 23 | 3.01% | 2,121 | 2,059 |
| Gladwin County | 24 | 2.75% | 26,067 | 25,370 |
| Barry County | 25 | 2.72% | 64,313 | 62,607 |
| Isabella County | 26 | 2.67% | 66,246 | 64,521 |
| Muskegon County | 27 | 2.6% | 179,332 | 174,794 |
| Washtenaw County | 28 | 2.41% | 380,829 | 371,849 |
| Allegan County | 29 | 2.39% | 123,539 | 120,661 |
| Kalamazoo County | 30 | 2.27% | 267,746 | 261,814 |
| Macomb County | 31 | 2.24% | 899,983 | 880,294 |
| Roscommon County | 32 | 2.09% | 23,956 | 23,465 |
| Manistee County | 33 | 2.06% | 25,587 | 25,070 |
| Clare County | 34 | 2.01% | 31,463 | 30,843 |
| Schoolcraft County | 35 | 1.77% | 8,200 | 8,057 |
| Livingston County | 36 | 1.75% | 197,384 | 193,989 |
| Clinton County | 37 | 1.68% | 80,504 | 79,171 |
| Leelanau County | 38 | 1.64% | 22,673 | 22,308 |
| Grand Traverse County | 39 | 1.61% | 96,961 | 95,427 |
| Van Buren County | 40 | 1.34% | 76,577 | 75,566 |
| Monroe County | 41 | 1.32% | 156,955 | 154,909 |
| Oceana County | 42 | 1.15% | 27,022 | 26,716 |
| Eaton County | 43 | 1.04% | 110,338 | 109,199 |
| Presque Isle County | 44 | 1.04% | 13,134 | 12,999 |
| Ogemaw County | 45 | 0.98% | 20,989 | 20,785 |
| Lapeer County | 46 | 0.9% | 89,384 | 88,587 |
| St. Joseph County | 47 | 0.73% | 61,389 | 60,942 |
| Iosco County | 48 | 0.68% | 25,361 | 25,189 |
| Midland County | 49 | 0.67% | 84,052 | 83,493 |
| Cheboygan County | 50 | 0.59% | 25,736 | 25,585 |
| Iron County | 51 | 0.55% | 11,683 | 11,619 |
| Jackson County | 52 | 0.5% | 161,029 | 160,223 |
| Charlevoix County | 53 | 0.39% | 26,137 | 26,035 |
| Alpena County | 54 | 0.31% | 28,969 | 28,879 |
| Calhoun County | 55 | 0.09% | 134,345 | 134,219 |
| Missaukee County | 56 | 0% | 15,067 | 15,067 |
| St. Clair County | 57 | -0.02% | 160,364 | 160,394 |
| Wayne County | 58 | -0.07% | 1,788,447 | 1,789,655 |
| Cass County | 59 | -0.07% | 51,518 | 51,553 |
| Shiawassee County | 60 | -0.1% | 67,936 | 68,004 |
| Dickinson County | 61 | -0.23% | 25,847 | 25,907 |
| Arenac County | 62 | -0.35% | 14,957 | 15,009 |
| Hillsdale County | 63 | -0.42% | 45,538 | 45,730 |
| Ionia County | 64 | -0.52% | 66,542 | 66,891 |
| Mason County | 65 | -0.54% | 28,881 | 29,037 |
| Genesee County | 66 | -0.59% | 403,415 | 405,793 |
| Ontonagon County | 67 | -0.78% | 5,758 | 5,803 |
| Baraga County | 68 | -0.96% | 8,063 | 8,141 |
| Emmet County | 69 | -1.01% | 33,769 | 34,113 |
| Berrien County | 70 | -1.05% | 152,807 | 154,426 |
| Gratiot County | 71 | -1.05% | 41,248 | 41,687 |
| Saginaw County | 72 | -1.2% | 187,604 | 189,883 |
| Sanilac County | 73 | -1.22% | 40,011 | 40,504 |
| Bay County | 74 | -1.29% | 102,405 | 103,747 |
| Lenawee County | 75 | -1.33% | 97,996 | 99,318 |
| Delta County | 76 | -1.37% | 36,369 | 36,874 |
| Tuscola County | 77 | -1.41% | 52,559 | 53,311 |
| Gogebic County | 78 | -1.54% | 14,125 | 14,346 |
| Chippewa County | 79 | -1.92% | 36,079 | 36,787 |
| Menominee County | 80 | -2.33% | 22,904 | 23,450 |
| Alger County | 81 | -2.65% | 8,605 | 8,839 |
| Huron County | 82 | -2.93% | 30,454 | 31,372 |
| Luce County | 83 | -3.18% | 6,206 | 6,410 |
Michigan's counties show varied growth patterns from 2020 to 2026. Lake County leads with 1.82% annualized growth, followed by Montmorency County (1.55%) and Mackinac County (1.11%). The largest counties are Wayne County (1,788,447), Oakland County (1,326,992), and Macomb County (899,983). Of the 83 counties in Michigan, 56 are growing while 27 have experienced population decline. Overall, counties averaged 0.27% annualized growth, with total population growing by 0.3% annually.
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