Last official estimated population of Iosco County was 25,810 (year 2014)[1]. This was 0.008% of total US population and 0.3% of total Michigan state population. Area of Iosco County is 1,890.1 mi² (=4895.2 km²), in this year population density was 13.66 p/mi². If population growth rate would be same as in period 2010-2014 (-0.07%/yr), Iosco County population in 2024 would be 25,619 [0].
Historical population of Iosco 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] +33.57 %/yr
[1870-1880] +8.07 %/yr
[1880-1890] +8.28 %/yr
[1890-1900] -3.88 %/yr
[1900-1910] -0.49 %/yr
[1910-1920] -1.72 %/yr
[1920-1930] -0.86 %/yr
[1930-1940] +1.31 %/yr
[1940-1950] +2.45 %/yr
[1950-1960] +4.23 %/yr
[1960-1970] +4.2 %/yr
[1970-1980] +1.3 %/yr
[1980-1990] +0.64 %/yr
[1990-2000] -0.99 %/yr
[2000-2005] -0.37 %/yr
[2005-2010] -0.72 %/yr
[2010-2014] -0.07 %/yr
Looking for settlements in Iosco County? Visit this page: Settlements in Iosco County, MI
Population of Iosco County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 596 | 560 | 1,156 |
| 5 to 9 | 537 | 571 | 1,108 |
| 10 to 14 | 646 | 608 | 1,254 |
| 15 to 19 | 660 | 596 | 1,256 |
| 20 to 24 | 596 | 536 | 1,132 |
| 25 to 29 | 564 | 551 | 1,115 |
| 30 to 34 | 558 | 551 | 1,109 |
| 35 to 39 | 513 | 531 | 1,044 |
| 40 to 44 | 608 | 584 | 1,192 |
| 45 to 49 | 775 | 744 | 1,519 |
| 50 to 54 | 913 | 1002 | 1,915 |
| 55 to 59 | 1161 | 1110 | 2,271 |
| 60 to 64 | 1117 | 1139 | 2,256 |
| 65 to 69 | 1073 | 1123 | 2,196 |
| 70 to 74 | 895 | 903 | 1,798 |
| 75 to 79 | 658 | 700 | 1,358 |
| 80 to 84 | 424 | 484 | 908 |
| 85+ | 320 | 513 | 833 |
Iosco 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 | 12329 | 12557 | 24,886 |
| WAC | 12313 | 12536 | 24,849 |
| WA | 12095 | 12304 | 24,399 |
| NHWAC | 12050 | 12308 | 24,358 |
| NHWA | 11856 | 12098 | 23,954 |
| H | 285 | 249 | 534 |
| HWAC | 263 | 228 | 491 |
| IAC | 246 | 227 | 473 |
| TOM | 232 | 236 | 468 |
| HWA | 239 | 206 | 445 |
| NHTOM | 208 | 213 | 421 |
| NHIAC | 212 | 198 | 410 |
| BAC | 162 | 141 | 303 |
| NHBAC | 157 | 131 | 288 |
| AAC | 110 | 129 | 239 |
| NHAAC | 106 | 126 | 232 |
| IA | 105 | 96 | 201 |
| AA | 74 | 97 | 171 |
| NHIA | 87 | 83 | 170 |
| NHAA | 74 | 95 | 169 |
| BA | 100 | 64 | 164 |
| NHBA | 99 | 61 | 160 |
| HIAC | 34 | 29 | 63 |
| HTOM | 24 | 23 | 47 |
| NAC | 20 | 15 | 35 |
| HIA | 18 | 13 | 31 |
| NHNAC | 17 | 13 | 30 |
| NA | 8 | 9 | 17 |
| HBAC | 5 | 10 | 15 |
| NHNA | 5 | 7 | 12 |
| HAAC | 4 | 3 | 7 |
| HNAC | 3 | 2 | 5 |
| HNA | 3 | 2 | 5 |
| HBA | 1 | 3 | 4 |
| HAA | 0 | 2 | 2 |
• Bay County population
71 mi, 
232°
• Tuscola County
65.1 mi, 
206°
• Sanilac County
61.7 mi, 
170°
• Huron County
29.1 mi, 
180°
• Alpena County
48.3 mi, 
324°
• Ogemaw County
63.2 mi, 
270°
• Arenac County
48.6 mi, 
245°
• Alcona County
24.4 mi, 
1°
• Montmorency County
79.1 mi, 
307°
• Oscoda County
67.6 mi, 
291°
[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
*Mackinac Michigan Notes
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