Last official estimated population of Clay County was 9,359 (year 2014)[1]. This was 0.003% of total US population and 0.5% of total West Virginia state population. Area of Clay County is 343.8 mi² (=890.5 km²), in this year population density was 27.22 p/mi². If population growth rate would be same as in period 2010-2014 (-0.07%/yr), Clay County population in 2026 would be 9,278 [0].
Historical population of Clay 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] +2.08 %/yr
[1870-1880] +4.65 %/yr
[1880-1890] +3.02 %/yr
[1890-1900] +5.88 %/yr
[1900-1910] +2.18 %/yr
[1910-1920] +1.16 %/yr
[1920-1930] +1.34 %/yr
[1930-1940] +1.48 %/yr
[1940-1950] -0.16 %/yr
[1950-1960] -2.23 %/yr
[1960-1970] -2.44 %/yr
[1970-1980] +1.9 %/yr
[1980-1990] -1.2 %/yr
[1990-2000] +0.35 %/yr
[2000-2005] -0.95 %/yr
[2005-2010] -0.96 %/yr
[2010-2014] -0.07 %/yr
Looking for settlements in Clay County? Visit this page: Settlements in Clay County, WV
Population of Clay County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 281 | 298 | 579 |
| 5 to 9 | 293 | 260 | 553 |
| 10 to 14 | 300 | 277 | 577 |
| 15 to 19 | 262 | 256 | 518 |
| 20 to 24 | 237 | 221 | 458 |
| 25 to 29 | 192 | 193 | 385 |
| 30 to 34 | 253 | 229 | 482 |
| 35 to 39 | 235 | 298 | 533 |
| 40 to 44 | 275 | 293 | 568 |
| 45 to 49 | 310 | 293 | 603 |
| 50 to 54 | 303 | 348 | 651 |
| 55 to 59 | 370 | 322 | 692 |
| 60 to 64 | 319 | 318 | 637 |
| 65 to 69 | 303 | 276 | 579 |
| 70 to 74 | 237 | 207 | 444 |
| 75 to 79 | 157 | 153 | 310 |
| 80 to 84 | 100 | 105 | 205 |
| 85+ | 52 | 115 | 167 |
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 | 4449 | 4443 | 8,892 |
| WAC | 4454 | 4432 | 8,886 |
| NHWAC | 4424 | 4413 | 8,837 |
| WA | 4406 | 4382 | 8,788 |
| NHWA | 4377 | 4365 | 8,742 |
| TOM | 50 | 53 | 103 |
| NHTOM | 49 | 51 | 100 |
| IAC | 35 | 34 | 69 |
| NHIAC | 35 | 33 | 68 |
| BAC | 27 | 40 | 67 |
| NHBAC | 27 | 38 | 65 |
| H | 30 | 19 | 49 |
| HWAC | 30 | 19 | 49 |
| HWA | 29 | 17 | 46 |
| AAC | 12 | 12 | 24 |
| NHAAC | 11 | 12 | 23 |
| IA | 11 | 11 | 22 |
| NHIA | 11 | 11 | 22 |
| BA | 10 | 9 | 19 |
| NHBA | 10 | 9 | 19 |
| AA | 2 | 5 | 7 |
| NHNAC | 2 | 5 | 7 |
| NHAA | 2 | 5 | 7 |
| NAC | 2 | 5 | 7 |
| HTOM | 1 | 2 | 3 |
| NA | 0 | 2 | 2 |
| NHNA | 0 | 2 | 2 |
| HBAC | 0 | 2 | 2 |
| HAAC | 1 | 0 | 1 |
| HIAC | 0 | 1 | 1 |
| HNAC | 0 | 0 | 0 |
| HIA | 0 | 0 | 0 |
| HBA | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Kanawha County population
25.6 mi, 
249°
• Fayette County
29.6 mi, 
180°
• Jackson County
41.3 mi, 
308°
• Nicholas County
19.3 mi, 
127°
• Roane County
24.5 mi, 
323°
• Braxton County
25.1 mi, 
48°
• Webster County
34.3 mi, 
87°
• Gilmer County
33.9 mi, 
21°
• Calhoun County
26.6 mi, 
356°
• Wirt County
42 mi, 
337°
[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 5 West Virginia Notes
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