Last official estimated population of Adair County was 18,871 (year 2014)[1]. This was 0.006% of total US population and 0.4% of total Kentucky state population. Area of Adair County is 412.4 mi² (=1068.1 km²), in this year population density was 45.76 p/mi². If population growth rate would be same as in period 2010-2014 (+0.29%/yr), Adair County population in 2025 would be 19,475 [0].
Historical population of Adair County for period 1810-2014 [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

[1810-1820] +3.84 %/yr
[1820-1830] -0.64 %/yr
[1830-1840] +0.3 %/yr
[1840-1850] +1.58 %/yr
[1850-1860] -0.4 %/yr
[1860-1870] +1.53 %/yr
[1870-1880] +1.69 %/yr
[1880-1890] +0.48 %/yr
[1890-1900] +0.82 %/yr
[1900-1910] +1.04 %/yr
[1910-1920] +0.47 %/yr
[1920-1930] -0.53 %/yr
[1930-1940] +1.25 %/yr
[1940-1950] -0.53 %/yr
[1950-1960] -1.79 %/yr
[1960-1970] -1.19 %/yr
[1970-1980] +1.57 %/yr
[1980-1990] +0.08 %/yr
[1990-2000] +1.18 %/yr
[2000-2005] +0.97 %/yr
[2005-2010] +0.58 %/yr
[2010-2014] +0.29 %/yr
Looking for settlements in Adair County? Visit this page: Settlements in Adair County, KY
Population of Adair County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 568 | 493 | 1,061 |
| 5 to 9 | 578 | 527 | 1,105 |
| 10 to 14 | 576 | 572 | 1,148 |
| 15 to 19 | 836 | 767 | 1,603 |
| 20 to 24 | 828 | 842 | 1,670 |
| 25 to 29 | 557 | 559 | 1,116 |
| 30 to 34 | 504 | 536 | 1,040 |
| 35 to 39 | 487 | 509 | 996 |
| 40 to 44 | 593 | 544 | 1,137 |
| 45 to 49 | 639 | 645 | 1,284 |
| 50 to 54 | 639 | 758 | 1,397 |
| 55 to 59 | 612 | 659 | 1,271 |
| 60 to 64 | 614 | 604 | 1,218 |
| 65 to 69 | 518 | 531 | 1,049 |
| 70 to 74 | 394 | 401 | 795 |
| 75 to 79 | 270 | 340 | 610 |
| 80 to 84 | 150 | 217 | 367 |
| 85+ | 118 | 219 | 337 |
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 | 9272 | 9565 | 18,837 |
| WAC | 9085 | 9405 | 18,490 |
| WA | 8974 | 9280 | 18,254 |
| NHWAC | 8895 | 9258 | 18,153 |
| NHWA | 8798 | 9149 | 17,947 |
| BAC | 407 | 326 | 733 |
| NHBAC | 388 | 312 | 700 |
| BA | 336 | 249 | 585 |
| NHBA | 328 | 242 | 570 |
| H | 209 | 158 | 367 |
| HWAC | 190 | 147 | 337 |
| HWA | 176 | 131 | 307 |
| TOM | 112 | 127 | 239 |
| NHTOM | 97 | 111 | 208 |
| IAC | 69 | 66 | 135 |
| NHIAC | 60 | 59 | 119 |
| AAC | 28 | 46 | 74 |
| NHAAC | 23 | 43 | 66 |
| AA | 22 | 36 | 58 |
| IA | 29 | 24 | 53 |
| NHAA | 18 | 35 | 53 |
| NHIA | 25 | 24 | 49 |
| HBAC | 19 | 14 | 33 |
| HTOM | 15 | 16 | 31 |
| NAC | 8 | 10 | 18 |
| HIAC | 9 | 7 | 16 |
| NA | 8 | 7 | 15 |
| HBA | 8 | 7 | 15 |
| NHNAC | 6 | 6 | 12 |
| NHNA | 6 | 4 | 10 |
| HAAC | 5 | 3 | 8 |
| HNAC | 2 | 4 | 6 |
| HAA | 4 | 1 | 5 |
| HNA | 2 | 3 | 5 |
| HIA | 4 | 0 | 4 |
• Taylor County population
18.2 mi,
351°
• Wayne County
32.6 mi,
130°
• Marion County
30.9 mi,
1°
• Hart County
36 mi,
293°
• Russell County
14.8 mi,
122°
• Casey County
24.5 mi,
52°
• Green County
19.1 mi,
306°
• Clinton County
27 mi,
164°
• Metcalfe County
20.9 mi,
248°
• Cumberland County
23 mi,
195°
[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
See note 2 Kentucky Notes
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