Last official estimated population of Ontonagon County was 6,742 (year 2014)[1]. This was 0.002% of total US population and 0.1% of total Michigan state population. Area of Ontonagon County is 3,740.8 mi² (=9688.6 km²), in this year population density was 1.80 p/mi². If population growth rate would be same as in period 2010-2014 (-0.14%/yr), Ontonagon County population in 2024 would be 6,648 [0].
Historical population of Ontonagon County for period 1850-2014 [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
[1850-1860] +27.93 %/yr
[1860-1870] -4.62 %/yr
[1870-1880] -1.03 %/yr
[1880-1890] +3.89 %/yr
[1890-1900] +5.13 %/yr
[1900-1910] +3.39 %/yr
[1910-1920] +3.69 %/yr
[1920-1930] -1.11 %/yr
[1930-1940] +0.22 %/yr
[1940-1950] -0.99 %/yr
[1950-1960] +0.29 %/yr
[1960-1970] -0.03 %/yr
[1970-1980] -0.67 %/yr
[1980-1990] -1.07 %/yr
[1990-2000] -1.24 %/yr
[2000-2005] -1.16 %/yr
[2005-2010] -1.67 %/yr
[2010-2014] -0.14 %/yr
Looking for settlements in Ontonagon County? Visit this page: Settlements in Ontonagon County, MI
Population of Ontonagon County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 87 | 64 | 151 |
| 5 to 9 | 115 | 99 | 214 |
| 10 to 14 | 137 | 136 | 273 |
| 15 to 19 | 148 | 137 | 285 |
| 20 to 24 | 93 | 87 | 180 |
| 25 to 29 | 88 | 76 | 164 |
| 30 to 34 | 101 | 103 | 204 |
| 35 to 39 | 116 | 99 | 215 |
| 40 to 44 | 135 | 141 | 276 |
| 45 to 49 | 191 | 194 | 385 |
| 50 to 54 | 272 | 273 | 545 |
| 55 to 59 | 319 | 312 | 631 |
| 60 to 64 | 347 | 321 | 668 |
| 65 to 69 | 341 | 292 | 633 |
| 70 to 74 | 273 | 259 | 532 |
| 75 to 79 | 213 | 197 | 410 |
| 80 to 84 | 103 | 99 | 202 |
| 85+ | 71 | 133 | 204 |
Ontonagon 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 | 3118 | 2987 | 6,105 |
| WAC | 3097 | 2958 | 6,055 |
| NHWAC | 3066 | 2929 | 5,995 |
| WA | 3061 | 2894 | 5,955 |
| NHWA | 3031 | 2870 | 5,901 |
| IAC | 51 | 84 | 135 |
| NHIAC | 49 | 76 | 125 |
| TOM | 38 | 65 | 103 |
| NHTOM | 37 | 60 | 97 |
| IA | 32 | 44 | 76 |
| NHIA | 31 | 39 | 70 |
| H | 32 | 35 | 67 |
| HWAC | 31 | 29 | 60 |
| HWA | 30 | 24 | 54 |
| BAC | 23 | 23 | 46 |
| NHBAC | 23 | 21 | 44 |
| AAC | 17 | 25 | 42 |
| NHAAC | 17 | 24 | 41 |
| NHAA | 8 | 13 | 21 |
| AA | 8 | 13 | 21 |
| BA | 10 | 6 | 16 |
| NHBA | 10 | 5 | 15 |
| HIAC | 2 | 8 | 10 |
| HTOM | 1 | 5 | 6 |
| HIA | 1 | 5 | 6 |
| NAC | 2 | 1 | 3 |
| NHNAC | 2 | 1 | 3 |
| HBAC | 0 | 2 | 2 |
| NHNA | 1 | 0 | 1 |
| NA | 1 | 0 | 1 |
| HAAC | 0 | 1 | 1 |
| HBA | 0 | 1 | 1 |
| HNAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
• Houghton County population
42.7 mi, 
110°
• Vilas County
80.6 mi, 
180°
• Gogebic County
52.1 mi, 
195°
• Ashland County
72.5 mi, 
230°
• Bayfield County
88.8 mi, 
243°
• Iron County
85.4 mi, 
147°
• Baraga County
64.6 mi, 
123°
• Iron County
71.3 mi, 
210°
• Cook County
43.1 mi, 
301°
• Keweenaw County
70.9 mi, 
63°
[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
*Chippewa Michigan Notes
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