Last official estimated population of Isabella County was 70,318 (year 2014)[1]. This was 0.022% of total US population and 0.7% of total Michigan state population. Area of Isabella County is 577.7 mi² (=1496.2 km²), in this year population density was 121.72 p/mi². If population growth rate would be same as in period 2010-2014 (+0%/yr), Isabella County population in 2026 would be 70,339 [0].
Historical population of Isabella County for period 1860-2014 [1] , [2] , [3]:
Estimated population for 2014[1]. Population density is in p./sq.mi [4]. Changes are for period 2010-2015. Value is %/year. Boundary lines are approx. 2012 [5]. Click on flag to hide it.
Population • Density • Changes • Legends • Position

[1860-1870] +11.04 %/yr
[1870-1880] +11.45 %/yr
[1880-1890] +4.45 %/yr
[1890-1900] +1.95 %/yr
[1900-1910] +0.11 %/yr
[1910-1920] -0.18 %/yr
[1920-1930] -0.68 %/yr
[1930-1940] +2.09 %/yr
[1940-1950] +1.09 %/yr
[1950-1960] +2.01 %/yr
[1960-1970] +2.35 %/yr
[1970-1980] +1.95 %/yr
[1980-1990] +0.09 %/yr
[1990-2000] +1.49 %/yr
[2000-2005] +1.37 %/yr
[2005-2010] +0.73 %/yr
[2010-2014] +0 %/yr
Looking for settlements in Isabella County? Visit this page: Settlements in Isabella County, MI
Population of Isabella County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1646 | 1641 | 3,287 |
| 5 to 9 | 1789 | 1712 | 3,501 |
| 10 to 14 | 1723 | 1716 | 3,439 |
| 15 to 19 | 3693 | 4450 | 8,143 |
| 20 to 24 | 7020 | 7764 | 14,784 |
| 25 to 29 | 2615 | 2264 | 4,879 |
| 30 to 34 | 2011 | 1814 | 3,825 |
| 35 to 39 | 1689 | 1624 | 3,313 |
| 40 to 44 | 1576 | 1573 | 3,149 |
| 45 to 49 | 1693 | 1738 | 3,431 |
| 50 to 54 | 1903 | 1885 | 3,788 |
| 55 to 59 | 1831 | 2035 | 3,866 |
| 60 to 64 | 1697 | 1756 | 3,453 |
| 65 to 69 | 1234 | 1315 | 2,549 |
| 70 to 74 | 887 | 977 | 1,864 |
| 75 to 79 | 606 | 741 | 1,347 |
| 80 to 84 | 387 | 577 | 964 |
| 85+ | 308 | 726 | 1,034 |
Isabella County resident population estimates by Sex, Race, and Hispanic Origin[1b]. For full list of abbrevations see: population.us/about page.
| Race | Male | Female | Total |
| NH | 32957 | 35026 | 67,983 |
| WAC | 31271 | 33297 | 64,568 |
| WA | 30419 | 32361 | 62,780 |
| NHWAC | 30175 | 32286 | 62,461 |
| NHWA | 29439 | 31461 | 60,900 |
| IAC | 1814 | 1785 | 3,599 |
| NHIAC | 1527 | 1531 | 3,058 |
| IA | 1373 | 1311 | 2,684 |
| BAC | 1277 | 1372 | 2,649 |
| H | 1351 | 1282 | 2,633 |
| NHBAC | 1200 | 1265 | 2,465 |
| NHIA | 1163 | 1128 | 2,291 |
| HWAC | 1096 | 1011 | 2,107 |
| TOM | 909 | 987 | 1,896 |
| BA | 920 | 961 | 1,881 |
| HWA | 980 | 900 | 1,880 |
| NHBA | 890 | 894 | 1,784 |
| AAC | 843 | 838 | 1,681 |
| NHTOM | 783 | 870 | 1,653 |
| NHAAC | 828 | 816 | 1,644 |
| AA | 677 | 663 | 1,340 |
| NHAA | 672 | 655 | 1,327 |
| HIAC | 287 | 254 | 541 |
| HIA | 210 | 183 | 393 |
| HTOM | 126 | 117 | 243 |
| HBAC | 77 | 107 | 184 |
| NAC | 53 | 61 | 114 |
| NHNAC | 46 | 52 | 98 |
| HBA | 30 | 67 | 97 |
| HAAC | 15 | 22 | 37 |
| NA | 10 | 25 | 35 |
| NHNA | 10 | 18 | 28 |
| HNAC | 7 | 9 | 16 |
| HAA | 5 | 8 | 13 |
| HNA | 0 | 7 | 7 |
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[0] Calculated by population.us from last known population growth rate, not official data.
[1] County population - 2014, archived from the original, retrieved 02/23/2016
[1b] Annual County Resident Population Estimates by Age, Sex, Race, and Hispanic Origin, (used only data for 2014) archived from the original, retrieved 02/23/2016
[2] County population - 2000-2010, archived from the original, retrieved 02/23/2016
[3] Population of States and Counties of the United States: 1790 to 1992, PDF, 15 Mb, census.gov, retrieved 02/23/2016
[4] County area, latitude longitude data, retrieved 02/23/2016
[5] County boundaries, CSV files on boundaries.us, retrived 03/18/2016
*Saginaw Michigan Notes
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