Last official estimated population of Clark County was 7,137 (year 2014)[1]. This was 0.002% of total US population and 0.1% of total Missouri state population. Area of Clark County is 511.8 mi² (=1325.6 km²), in this year population density was 13.94 p/mi². If population growth rate would be same as in period 2010-2014 (-0.01%/yr), Clark County population in 2024 would be 7,132 [0].
Historical population of Clark County for period 1840-2014 [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
[1840-1850] +6.86 %/yr
[1850-1860] +7.77 %/yr
[1860-1870] +1.58 %/yr
[1870-1880] +0.96 %/yr
[1880-1890] +0.06 %/yr
[1890-1900] +0.17 %/yr
[1900-1910] -1.81 %/yr
[1910-1920] -0.76 %/yr
[1920-1930] -1.46 %/yr
[1930-1940] -0.09 %/yr
[1940-1950] -1.21 %/yr
[1950-1960] -0.31 %/yr
[1960-1970] -0.55 %/yr
[1970-1980] +0.28 %/yr
[1980-1990] -1.17 %/yr
[1990-2000] -0.17 %/yr
[2000-2005] -0.52 %/yr
[2005-2010] -0.24 %/yr
[2010-2014] -0.01 %/yr
Looking for settlements in Clark County? Visit this page: Settlements in Clark County, MO
Population of Clark County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 207 | 198 | 405 |
| 5 to 9 | 256 | 223 | 479 |
| 10 to 14 | 223 | 228 | 451 |
| 15 to 19 | 231 | 192 | 423 |
| 20 to 24 | 172 | 179 | 351 |
| 25 to 29 | 196 | 152 | 348 |
| 30 to 34 | 169 | 192 | 361 |
| 35 to 39 | 215 | 189 | 404 |
| 40 to 44 | 190 | 173 | 363 |
| 45 to 49 | 240 | 215 | 455 |
| 50 to 54 | 276 | 267 | 543 |
| 55 to 59 | 272 | 255 | 527 |
| 60 to 64 | 246 | 237 | 483 |
| 65 to 69 | 205 | 209 | 414 |
| 70 to 74 | 152 | 170 | 322 |
| 75 to 79 | 116 | 115 | 231 |
| 80 to 84 | 72 | 109 | 181 |
| 85+ | 62 | 114 | 176 |
Clark 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 | 3469 | 3390 | 6,859 |
| WAC | 3466 | 3377 | 6,843 |
| NHWAC | 3439 | 3354 | 6,793 |
| WA | 3431 | 3340 | 6,771 |
| NHWA | 3404 | 3317 | 6,721 |
| TOM | 37 | 38 | 75 |
| NHTOM | 37 | 38 | 75 |
| H | 31 | 27 | 58 |
| BAC | 25 | 27 | 52 |
| NHBAC | 25 | 27 | 52 |
| HWA | 27 | 23 | 50 |
| HWAC | 27 | 23 | 50 |
| IAC | 24 | 26 | 50 |
| AAC | 21 | 25 | 46 |
| NHAAC | 20 | 25 | 45 |
| NHIAC | 22 | 22 | 44 |
| AA | 12 | 20 | 32 |
| NHAA | 11 | 20 | 31 |
| BA | 11 | 10 | 21 |
| NHBA | 11 | 10 | 21 |
| IA | 8 | 9 | 17 |
| NHIA | 6 | 5 | 11 |
| HIA | 2 | 4 | 6 |
| HIAC | 2 | 4 | 6 |
| HNAC | 1 | 0 | 1 |
| NAC | 1 | 0 | 1 |
| NA | 1 | 0 | 1 |
| HAAC | 1 | 0 | 1 |
| HAA | 1 | 0 | 1 |
| HNA | 1 | 0 | 1 |
| NHNA | 0 | 0 | 0 |
| NHNAC | 0 | 0 | 0 |
| HBAC | 0 | 0 | 0 |
| HBA | 0 | 0 | 0 |
| HTOM | 0 | 0 | 0 |
• Adams County population
40.5 mi, 
135°
• Lee County
21.2 mi, 
38°
• Marion County
41.7 mi, 
173°
• Henry County
41.1 mi, 
13°
• Hancock County
29.5 mi, 
90°
• Lewis County
22.3 mi, 
179°
• Van Buren County
26.7 mi, 
333°
• Scotland County
21.9 mi, 
277°
• Schuyler County
41.7 mi, 275°
• Knox County
28.9 mi, 
229°
[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
*Marion, Randolph Missouri Notes
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