Last official estimated population of Ionia County was 63,848 (year 2014)[1]. This was 0.02% of total US population and 0.6% of total Michigan state population. Area of Ionia County is 580.0 mi² (=1502.3 km²), in this year population density was 110.07 p/mi². If population growth rate would be same as in period 2010-2014 (-0.02%/yr), Ionia County population in 2025 would be 63,692 [0].
Historical population of Ionia County for period 1840-2014 [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
[1840-1850] +14.73 %/yr
[1850-1860] +8.18 %/yr
[1860-1870] +5.19 %/yr
[1870-1880] +2.04 %/yr
[1880-1890] -0.32 %/yr
[1890-1900] +0.46 %/yr
[1900-1910] -0.23 %/yr
[1910-1920] -0.14 %/yr
[1920-1930] +0.59 %/yr
[1930-1940] +0.17 %/yr
[1940-1950] +0.67 %/yr
[1950-1960] +1.23 %/yr
[1960-1970] +0.61 %/yr
[1970-1980] +1.23 %/yr
[1980-1990] +0.96 %/yr
[1990-2000] +0.76 %/yr
[2000-2005] +1.02 %/yr
[2005-2010] -0.26 %/yr
[2010-2014] -0.02 %/yr
Looking for settlements in Ionia County? Visit this page: Settlements in Ionia County, MI
Population of Ionia County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1884 | 1771 | 3,655 |
| 5 to 9 | 2120 | 2102 | 4,222 |
| 10 to 14 | 2262 | 2091 | 4,353 |
| 15 to 19 | 2307 | 2025 | 4,332 |
| 20 to 24 | 2800 | 1714 | 4,514 |
| 25 to 29 | 2599 | 1703 | 4,302 |
| 30 to 34 | 2499 | 1832 | 4,331 |
| 35 to 39 | 2365 | 1786 | 4,151 |
| 40 to 44 | 2525 | 1931 | 4,456 |
| 45 to 49 | 2528 | 2021 | 4,549 |
| 50 to 54 | 2558 | 2253 | 4,811 |
| 55 to 59 | 2322 | 2184 | 4,506 |
| 60 to 64 | 1940 | 1836 | 3,776 |
| 65 to 69 | 1455 | 1467 | 2,922 |
| 70 to 74 | 1000 | 1103 | 2,103 |
| 75 to 79 | 655 | 788 | 1,443 |
| 80 to 84 | 392 | 604 | 996 |
| 85+ | 298 | 574 | 872 |
Ionia 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 | 32695 | 28557 | 61,252 |
| WAC | 31101 | 29284 | 60,385 |
| WA | 30643 | 28829 | 59,472 |
| NHWAC | 29427 | 28147 | 57,574 |
| NHWA | 29041 | 27741 | 56,782 |
| BAC | 3219 | 360 | 3,579 |
| NHBAC | 3133 | 317 | 3,450 |
| BA | 3027 | 150 | 3,177 |
| NHBA | 2967 | 127 | 3,094 |
| H | 1814 | 1228 | 3,042 |
| HWAC | 1674 | 1137 | 2,811 |
| HWA | 1602 | 1088 | 2,690 |
| TOM | 471 | 470 | 941 |
| NHTOM | 399 | 420 | 819 |
| IAC | 406 | 370 | 776 |
| NHIAC | 302 | 288 | 590 |
| AAC | 233 | 232 | 465 |
| NHAAC | 215 | 220 | 435 |
| IA | 213 | 177 | 390 |
| AA | 142 | 151 | 293 |
| NHAA | 135 | 142 | 277 |
| NHIA | 146 | 123 | 269 |
| HIAC | 104 | 82 | 186 |
| HBAC | 86 | 43 | 129 |
| HTOM | 72 | 50 | 122 |
| HIA | 67 | 54 | 121 |
| HBA | 60 | 23 | 83 |
| NAC | 31 | 21 | 52 |
| NHNAC | 25 | 17 | 42 |
| HAAC | 18 | 12 | 30 |
| NA | 13 | 8 | 21 |
| HAA | 7 | 9 | 16 |
| NHNA | 7 | 4 | 11 |
| HNAC | 6 | 4 | 10 |
| HNA | 6 | 4 | 10 |
• Kent County population
24.7 mi, 
284°
• Ingham County
42.6 mi, 
123°
• Calhoun County
48.6 mi, 
176°
• Eaton County
27.1 mi, 
154°
• Clinton County
24.4 mi, 
89°
• Shiawassee County
46.9 mi, 89°
• Montcalm County
25.7 mi, 
351°
• Barry County
27.8 mi, 
206°
• Mecosta County
49.5 mi, 
344°
• Gratiot County
33.7 mi, 
44°
[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
*St. Joseph Michigan Notes
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