Last official estimated population of Aitkin County was 16,219 (year 2014)[1]. This was 0.005% of total US population and 0.3% of total Minnesota state population. Area of Aitkin County is 1,995.3 mi² (=5167.8 km²), in this year population density was 8.13 p/mi². If population growth rate would be same as in period 2010-2014 (+0.03%/yr), Aitkin County population in 2026 would be 16,270 [0].
Historical population of Aitkin 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] +56.65 %/yr
[1870-1880] +7.47 %/yr
[1880-1890] +21 %/yr
[1890-1900] +10.6 %/yr
[1900-1910] +4.4 %/yr
[1910-1920] +3.79 %/yr
[1920-1930] -0.02 %/yr
[1930-1940] +1.76 %/yr
[1940-1950] -2.18 %/yr
[1950-1960] -1.62 %/yr
[1960-1970] -0.64 %/yr
[1970-1980] +1.63 %/yr
[1980-1990] -0.76 %/yr
[1990-2000] +2.05 %/yr
[2000-2005] +1.21 %/yr
[2005-2010] +0.05 %/yr
[2010-2014] +0.03 %/yr
Looking for settlements in Aitkin County? Visit this page: Settlements in Aitkin County, MN
Population of Aitkin County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 337 | 310 | 647 |
| 5 to 9 | 422 | 375 | 797 |
| 10 to 14 | 392 | 397 | 789 |
| 15 to 19 | 401 | 387 | 788 |
| 20 to 24 | 302 | 297 | 599 |
| 25 to 29 | 260 | 274 | 534 |
| 30 to 34 | 328 | 319 | 647 |
| 35 to 39 | 317 | 299 | 616 |
| 40 to 44 | 361 | 353 | 714 |
| 45 to 49 | 420 | 419 | 839 |
| 50 to 54 | 612 | 601 | 1,213 |
| 55 to 59 | 711 | 652 | 1,363 |
| 60 to 64 | 749 | 735 | 1,484 |
| 65 to 69 | 759 | 732 | 1,491 |
| 70 to 74 | 689 | 663 | 1,352 |
| 75 to 79 | 446 | 437 | 883 |
| 80 to 84 | 268 | 261 | 529 |
| 85+ | 199 | 287 | 486 |
Aitkin 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 | 7878 | 7711 | 15,589 |
| WAC | 7699 | 7500 | 15,199 |
| NHWAC | 7626 | 7433 | 15,059 |
| WA | 7601 | 7363 | 14,964 |
| NHWA | 7537 | 7306 | 14,843 |
| IAC | 257 | 296 | 553 |
| NHIAC | 240 | 277 | 517 |
| IA | 208 | 230 | 438 |
| NHIA | 193 | 216 | 409 |
| TOM | 104 | 143 | 247 |
| NHTOM | 95 | 133 | 228 |
| H | 95 | 87 | 182 |
| BAC | 75 | 89 | 164 |
| HWAC | 73 | 67 | 140 |
| NHBAC | 62 | 78 | 140 |
| HWA | 64 | 57 | 121 |
| NHAAC | 45 | 54 | 99 |
| AAC | 45 | 54 | 99 |
| BA | 35 | 31 | 66 |
| NHBA | 28 | 25 | 53 |
| AA | 24 | 28 | 52 |
| NHAA | 24 | 28 | 52 |
| HIAC | 17 | 19 | 36 |
| HIA | 15 | 14 | 29 |
| HBAC | 13 | 11 | 24 |
| HTOM | 9 | 10 | 19 |
| HBA | 7 | 6 | 13 |
| NAC | 3 | 4 | 7 |
| NHNAC | 2 | 4 | 6 |
| NA | 1 | 3 | 4 |
| NHNA | 1 | 3 | 4 |
| HNAC | 1 | 0 | 1 |
| HAAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
• Crow Wing County population
31.9 mi,
256°
• Itasca County
62 mi,
351°
• Benton County
68.2 mi,
204°
• Carlton County
35.5 mi,
89°
• Morrison County
57 mi,
225°
• Pine County
46.7 mi,
137°
• Cass County
49.5 mi,
299°
• Mille Lacs County
47.6 mi,
192°
• Kanabec County
45.6 mi,
172°
• Burnett County
71.2 mi,
135°
[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
*Ramsey, Benton Minnesota Notes
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