Last official estimated population of Clark County was 3,701 (year 2014)[1]. This was 0.001% of total US population and 0.4% of total South Dakota state population. Area of Clark County is 967.5 mi² (=2505.8 km²), in this year population density was 3.83 p/mi². If population growth rate would be same as in period 2010-2014 (+0.07%/yr), Clark County population in 2024 would be 3,726 [0].
Historical population of Clark 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] +50.35 %/yr
[1890-1900] +0.31 %/yr
[1900-1910] +4.62 %/yr
[1910-1920] +0.21 %/yr
[1920-1930] -0.1 %/yr
[1930-1940] -2.06 %/yr
[1940-1950] -0.67 %/yr
[1950-1960] -1.58 %/yr
[1960-1970] -2.54 %/yr
[1970-1980] -1.19 %/yr
[1980-1990] -1.05 %/yr
[1990-2000] -0.61 %/yr
[2000-2005] -1.57 %/yr
[2005-2010] -0.72 %/yr
[2010-2014] +0.07 %/yr
Looking for settlements in Clark County? Visit this page: Settlements in Clark County, SD
Population of Clark County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 150 | 154 | 304 |
| 5 to 9 | 121 | 112 | 233 |
| 10 to 14 | 102 | 96 | 198 |
| 15 to 19 | 113 | 96 | 209 |
| 20 to 24 | 102 | 90 | 192 |
| 25 to 29 | 105 | 101 | 206 |
| 30 to 34 | 109 | 89 | 198 |
| 35 to 39 | 100 | 79 | 179 |
| 40 to 44 | 88 | 80 | 168 |
| 45 to 49 | 89 | 93 | 182 |
| 50 to 54 | 138 | 125 | 263 |
| 55 to 59 | 153 | 123 | 276 |
| 60 to 64 | 149 | 143 | 292 |
| 65 to 69 | 99 | 99 | 198 |
| 70 to 74 | 76 | 83 | 159 |
| 75 to 79 | 66 | 73 | 139 |
| 80 to 84 | 43 | 64 | 107 |
| 85+ | 46 | 96 | 142 |
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 |
| WAC | 1797 | 1784 | 3,581 |
| WA | 1779 | 1771 | 3,550 |
| NH | 1797 | 1746 | 3,543 |
| NHWAC | 1751 | 1735 | 3,486 |
| NHWA | 1736 | 1723 | 3,459 |
| H | 52 | 50 | 102 |
| HWAC | 46 | 49 | 95 |
| HWA | 43 | 48 | 91 |
| BAC | 52 | 15 | 67 |
| NHBAC | 46 | 14 | 60 |
| BA | 44 | 8 | 52 |
| NHBA | 39 | 7 | 46 |
| TOM | 19 | 13 | 32 |
| NHTOM | 16 | 12 | 28 |
| IAC | 15 | 6 | 21 |
| NHIAC | 13 | 5 | 18 |
| IA | 6 | 2 | 8 |
| HBAC | 6 | 1 | 7 |
| NHIA | 5 | 2 | 7 |
| NHAAC | 3 | 4 | 7 |
| AAC | 3 | 4 | 7 |
| HBA | 5 | 1 | 6 |
| HTOM | 3 | 1 | 4 |
| HIAC | 2 | 1 | 3 |
| NHAA | 1 | 2 | 3 |
| AA | 1 | 2 | 3 |
| HNAC | 1 | 0 | 1 |
| HIA | 1 | 0 | 1 |
| NAC | 1 | 0 | 1 |
| HNA | 0 | 0 | 0 |
| NHNA | 0 | 0 | 0 |
| NHNAC | 0 | 0 | 0 |
| NA | 0 | 0 | 0 |
| HAAC | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
• Brookings County population
56.3 mi, 
125°
• Codington County
26.9 mi, 
73°
• Beadle County
40.7 mi, 
222°
• Grant County
51.4 mi, 
64°
• Spink County
30.5 mi, 
278°
• Hamlin County
29.4 mi, 
114°
• Day County
35.2 mi, 
11°
• Kingsbury County
35.8 mi, 
161°
• Deuel County
51.2 mi, 
97°
• Miner County
57.9 mi, 
174°
[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
*Buffalo South Dakota Notes
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