Last official estimated population of Clay County was 20,557 (year 2014)[1]. This was 0.006% of total US population and 0.7% of total Mississippi state population. Area of Clay County is 416.0 mi² (=1077.5 km²), in this year population density was 49.41 p/mi². If population growth rate would be same as in period 2010-2014 (-0.09%/yr), Clay County population in 2025 would be 20,347 [0].
Historical population of Clay County for period 1880-2014 [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
[1880-1890] +0.69 %/yr
[1890-1900] +0.5 %/yr
[1900-1910] +0.32 %/yr
[1910-1920] -1.43 %/yr
[1920-1930] +0.25 %/yr
[1930-1940] +0.6 %/yr
[1940-1950] -0.69 %/yr
[1950-1960] +0.64 %/yr
[1960-1970] -0.05 %/yr
[1970-1980] +1.13 %/yr
[1980-1990] +0.02 %/yr
[1990-2000] +0.4 %/yr
[2000-2005] -0.68 %/yr
[2005-2010] -0.58 %/yr
[2010-2014] -0.09 %/yr
Looking for settlements in Clay County? Visit this page: Settlements in Clay County, MS
Population of Clay County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 635 | 607 | 1,242 |
| 5 to 9 | 705 | 712 | 1,417 |
| 10 to 14 | 703 | 659 | 1,362 |
| 15 to 19 | 648 | 683 | 1,331 |
| 20 to 24 | 710 | 736 | 1,446 |
| 25 to 29 | 586 | 641 | 1,227 |
| 30 to 34 | 555 | 634 | 1,189 |
| 35 to 39 | 516 | 635 | 1,151 |
| 40 to 44 | 555 | 624 | 1,179 |
| 45 to 49 | 544 | 635 | 1,179 |
| 50 to 54 | 633 | 787 | 1,420 |
| 55 to 59 | 694 | 801 | 1,495 |
| 60 to 64 | 589 | 696 | 1,285 |
| 65 to 69 | 544 | 575 | 1,119 |
| 70 to 74 | 333 | 386 | 719 |
| 75 to 79 | 271 | 341 | 612 |
| 80 to 84 | 167 | 270 | 437 |
| 85+ | 116 | 299 | 415 |
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 | 9332 | 10607 | 19,939 |
| BAC | 5418 | 6517 | 11,935 |
| BA | 5380 | 6479 | 11,859 |
| NHBAC | 5349 | 6477 | 11,826 |
| NHBA | 5316 | 6448 | 11,764 |
| WAC | 4079 | 4184 | 8,263 |
| WA | 4012 | 4125 | 8,137 |
| NHWAC | 3975 | 4104 | 8,079 |
| NHWA | 3916 | 4057 | 7,973 |
| H | 172 | 114 | 286 |
| HWAC | 104 | 80 | 184 |
| HWA | 96 | 68 | 164 |
| TOM | 76 | 68 | 144 |
| NHTOM | 67 | 54 | 121 |
| HBAC | 69 | 40 | 109 |
| HBA | 64 | 31 | 95 |
| IAC | 37 | 48 | 85 |
| AAC | 40 | 40 | 80 |
| NHAAC | 37 | 38 | 75 |
| NHIAC | 32 | 43 | 75 |
| AA | 23 | 27 | 50 |
| NHAA | 22 | 26 | 48 |
| IA | 11 | 22 | 33 |
| NHIA | 9 | 22 | 31 |
| HTOM | 9 | 14 | 23 |
| HIAC | 5 | 5 | 10 |
| NAC | 7 | 2 | 9 |
| NHNAC | 7 | 1 | 8 |
| HAAC | 3 | 2 | 5 |
| NA | 2 | 0 | 2 |
| NHNA | 2 | 0 | 2 |
| HIA | 2 | 0 | 2 |
| HAA | 1 | 1 | 2 |
| HNAC | 0 | 1 | 1 |
| HNA | 0 | 0 | 0 |
• Lowndes County population
23.8 mi, 
123°
• Oktibbeha County
17.4 mi, 
197°
• Monroe County
23.3 mi, 
47°
• Pontotoc County
41.7 mi, 
339°
• Chickasaw County
20.2 mi, 
332°
• Calhoun County
37 mi, 
300°
• Lamar County
40.9 mi, 
77°
• Noxubee County
40.4 mi, 
161°
• Webster County
29 mi, 
263°
• Choctaw County
34.7 mi, 
231°
[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 3 Mississippi Notes
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