Last official estimated population of Adair County was 25,619 (year 2014)[1]. This was 0.008% of total US population and 0.4% of total Missouri state population. Area of Adair County is 569.4 mi² (=1474.8 km²), in this year population density was 44.99 p/mi². If population growth rate would be same as in period 2010-2014 (+0.01%/yr), Adair County population in 2026 would be 25,655 [0].
Historical population of Adair 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] +13.8 %/yr
[1860-1870] +2.98 %/yr
[1870-1880] +2.87 %/yr
[1880-1890] +1.38 %/yr
[1890-1900] +2.24 %/yr
[1900-1910] +0.44 %/yr
[1910-1920] -0.59 %/yr
[1920-1930] -0.96 %/yr
[1930-1940] +0.41 %/yr
[1940-1950] -0.28 %/yr
[1950-1960] +0.21 %/yr
[1960-1970] +1.12 %/yr
[1970-1980] +1.02 %/yr
[1980-1990] -0.12 %/yr
[1990-2000] +0.16 %/yr
[2000-2005] -0.1 %/yr
[2005-2010] +0.6 %/yr
[2010-2014] +0.01 %/yr
Looking for settlements in Adair County? Visit this page: Settlements in Adair County, MO
Population of Adair County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 645 | 538 | 1,183 |
| 5 to 9 | 705 | 668 | 1,373 |
| 10 to 14 | 710 | 659 | 1,369 |
| 15 to 19 | 1296 | 1601 | 2,897 |
| 20 to 24 | 2259 | 2500 | 4,759 |
| 25 to 29 | 715 | 756 | 1,471 |
| 30 to 34 | 615 | 616 | 1,231 |
| 35 to 39 | 524 | 572 | 1,096 |
| 40 to 44 | 602 | 599 | 1,201 |
| 45 to 49 | 645 | 633 | 1,278 |
| 50 to 54 | 718 | 789 | 1,507 |
| 55 to 59 | 725 | 721 | 1,446 |
| 60 to 64 | 648 | 656 | 1,304 |
| 65 to 69 | 502 | 572 | 1,074 |
| 70 to 74 | 411 | 445 | 856 |
| 75 to 79 | 268 | 362 | 630 |
| 80 to 84 | 169 | 259 | 428 |
| 85+ | 159 | 340 | 499 |
Adair 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 | 11999 | 12938 | 24,937 |
| WAC | 11760 | 12686 | 24,446 |
| WA | 11526 | 12461 | 23,987 |
| NHWAC | 11467 | 12356 | 23,823 |
| NHWA | 11252 | 12145 | 23,397 |
| AAC | 355 | 346 | 701 |
| NHAAC | 348 | 345 | 693 |
| BAC | 312 | 363 | 675 |
| H | 317 | 348 | 665 |
| NHBAC | 294 | 346 | 640 |
| HWAC | 293 | 330 | 623 |
| HWA | 274 | 316 | 590 |
| AA | 289 | 277 | 566 |
| NHAA | 285 | 277 | 562 |
| BA | 216 | 265 | 481 |
| TOM | 238 | 233 | 471 |
| NHBA | 205 | 251 | 456 |
| NHTOM | 219 | 219 | 438 |
| IAC | 122 | 108 | 230 |
| NHIAC | 101 | 94 | 195 |
| IA | 43 | 37 | 80 |
| NHIA | 34 | 33 | 67 |
| NAC | 13 | 25 | 38 |
| NHNAC | 13 | 24 | 37 |
| HIAC | 21 | 14 | 35 |
| HBAC | 18 | 17 | 35 |
| HTOM | 19 | 14 | 33 |
| HBA | 11 | 14 | 25 |
| NHNA | 4 | 13 | 17 |
| NA | 4 | 13 | 17 |
| HIA | 9 | 4 | 13 |
| HAAC | 7 | 1 | 8 |
| HAA | 4 | 0 | 4 |
| HNAC | 0 | 1 | 1 |
| HNA | 0 | 0 | 0 |
• Macon County population
25 mi, 
175°
• Appanoose County
40.8 mi, 
339°
• Linn County
34.9 mi, 
229°
• Davis County
39.8 mi, 
14°
• Sullivan County
26.7 mi, 
272°
• Shelby County
38.5 mi, 
134°
• Putnam County
29.4 mi, 
312°
• Scotland County
30.1 mi, 
53°
• Schuyler County
19.8 mi, 13°
• Knox County
24.4 mi, 
98°
[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
*Macon Missouri Notes
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