Last official estimated population of Clay County was 21,691 (year 2014)[1]. This was 0.007% of total US population and 0.5% of total Kentucky state population. Area of Clay County is 471.1 mi² (=1220.1 km²), in this year population density was 46.04 p/mi². If population growth rate would be same as in period 2010-2014 (-0.04%/yr), Clay County population in 2024 would be 21,594 [0].
Historical population of Clay 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] +6.24 %/yr
[1820-1830] -2.11 %/yr
[1830-1840] +2.65 %/yr
[1840-1850] +1.64 %/yr
[1850-1860] +2.07 %/yr
[1860-1870] +2.23 %/yr
[1870-1880] +2.11 %/yr
[1880-1890] +1.99 %/yr
[1890-1900] +2.13 %/yr
[1900-1910] +1.48 %/yr
[1910-1920] +1.07 %/yr
[1920-1930] -0.66 %/yr
[1930-1940] +2.58 %/yr
[1940-1950] -0.33 %/yr
[1950-1960] -1.07 %/yr
[1960-1970] -1.15 %/yr
[1970-1980] +2.1 %/yr
[1980-1990] -0.45 %/yr
[1990-2000] +1.24 %/yr
[2000-2005] -1.37 %/yr
[2005-2010] -1.08 %/yr
[2010-2014] -0.04 %/yr
Looking for settlements in Clay County? Visit this page: Settlements in Clay County, KY
Population of Clay County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 659 | 648 | 1,307 |
| 5 to 9 | 612 | 575 | 1,187 |
| 10 to 14 | 636 | 537 | 1,173 |
| 15 to 19 | 643 | 596 | 1,239 |
| 20 to 24 | 747 | 645 | 1,392 |
| 25 to 29 | 905 | 602 | 1,507 |
| 30 to 34 | 976 | 634 | 1,610 |
| 35 to 39 | 903 | 637 | 1,540 |
| 40 to 44 | 893 | 670 | 1,563 |
| 45 to 49 | 844 | 707 | 1,551 |
| 50 to 54 | 828 | 749 | 1,577 |
| 55 to 59 | 694 | 670 | 1,364 |
| 60 to 64 | 631 | 644 | 1,275 |
| 65 to 69 | 474 | 562 | 1,036 |
| 70 to 74 | 329 | 394 | 723 |
| 75 to 79 | 230 | 300 | 530 |
| 80 to 84 | 135 | 182 | 317 |
| 85+ | 79 | 177 | 256 |
Clay 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 | 10878 | 9852 | 20,730 |
| WAC | 10378 | 9762 | 20,140 |
| WA | 10297 | 9661 | 19,958 |
| NHWAC | 10066 | 9688 | 19,754 |
| NHWA | 9990 | 9588 | 19,578 |
| BAC | 815 | 182 | 997 |
| NHBAC | 788 | 181 | 969 |
| BA | 781 | 132 | 913 |
| NHBA | 758 | 131 | 889 |
| H | 340 | 77 | 417 |
| HWAC | 312 | 74 | 386 |
| HWA | 307 | 73 | 380 |
| TOM | 89 | 106 | 195 |
| NHTOM | 83 | 105 | 188 |
| IAC | 77 | 53 | 130 |
| NHIAC | 74 | 50 | 124 |
| AAC | 31 | 34 | 65 |
| NHAAC | 29 | 34 | 63 |
| IA | 28 | 10 | 38 |
| AA | 19 | 18 | 37 |
| NHAA | 18 | 18 | 36 |
| NHIA | 27 | 8 | 35 |
| HBAC | 27 | 1 | 28 |
| HBA | 23 | 1 | 24 |
| NAC | 9 | 4 | 13 |
| NHNAC | 6 | 4 | 10 |
| HTOM | 6 | 1 | 7 |
| NA | 4 | 2 | 6 |
| HIAC | 3 | 3 | 6 |
| NHNA | 2 | 2 | 4 |
| HNAC | 3 | 0 | 3 |
| HIA | 1 | 2 | 3 |
| HNA | 2 | 0 | 2 |
| HAAC | 2 | 0 | 2 |
| HAA | 1 | 0 | 1 |
• Laurel County population
22.3 mi, 
262°
• Knox County
20.1 mi, 
202°
• Harlan County
34.3 mi, 
126°
• Bell County
30.1 mi, 
176°
• Perry County
28.2 mi, 
78°
• Breathitt County
34 mi, 
44°
• Jackson County
23.8 mi, 
315°
• Leslie County
18.8 mi, 
104°
• Lee County
31.1 mi, 
359°
• Owsley County
18.5 mi, 
4°
[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 17 Kentucky Notes
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