Last official estimated population of Custer County was 8,269 (year 2014)[1]. This was 0.003% of total US population and 1% of total South Dakota state population. Area of Custer County is 1,559.1 mi² (=4038.2 km²), in this year population density was 5.30 p/mi². If population growth rate would be same as in period 2010-2014 (+0.16%/yr), Custer County population in 2024 would be 8,403 [0].
Historical population of Custer 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] +17.26 %/yr
[1890-1900] -5.67 %/yr
[1900-1910] +5.03 %/yr
[1910-1920] -1.31 %/yr
[1920-1930] +3.2 %/yr
[1930-1940] +1.19 %/yr
[1940-1950] -0.87 %/yr
[1950-1960] -1.17 %/yr
[1960-1970] -0.43 %/yr
[1970-1980] +2.48 %/yr
[1980-1990] +0.29 %/yr
[1990-2000] +1.64 %/yr
[2000-2005] +1.45 %/yr
[2005-2010] +1.02 %/yr
[2010-2014] +0.16 %/yr
Looking for settlements in Custer County? Visit this page: Settlements in Custer County, SD
Population of Custer County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 171 | 160 | 331 |
| 5 to 9 | 183 | 170 | 353 |
| 10 to 14 | 199 | 186 | 385 |
| 15 to 19 | 293 | 205 | 498 |
| 20 to 24 | 129 | 135 | 264 |
| 25 to 29 | 150 | 142 | 292 |
| 30 to 34 | 201 | 182 | 383 |
| 35 to 39 | 171 | 179 | 350 |
| 40 to 44 | 185 | 217 | 402 |
| 45 to 49 | 253 | 258 | 511 |
| 50 to 54 | 321 | 397 | 718 |
| 55 to 59 | 389 | 469 | 858 |
| 60 to 64 | 477 | 461 | 938 |
| 65 to 69 | 415 | 383 | 798 |
| 70 to 74 | 301 | 274 | 575 |
| 75 to 79 | 180 | 166 | 346 |
| 80 to 84 | 107 | 107 | 214 |
| 85+ | 74 | 155 | 229 |
Custer 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 | 4069 | 4120 | 8,189 |
| WAC | 4009 | 4041 | 8,050 |
| WA | 3929 | 3950 | 7,879 |
| NHWAC | 3891 | 3932 | 7,823 |
| NHWA | 3817 | 3849 | 7,666 |
| IAC | 192 | 225 | 417 |
| NHIAC | 174 | 204 | 378 |
| IA | 129 | 154 | 283 |
| H | 130 | 126 | 256 |
| NHIA | 117 | 139 | 256 |
| HWAC | 118 | 109 | 227 |
| HWA | 112 | 101 | 213 |
| TOM | 85 | 94 | 179 |
| NHTOM | 79 | 85 | 164 |
| BAC | 54 | 40 | 94 |
| NHBAC | 54 | 35 | 89 |
| AAC | 27 | 34 | 61 |
| NHAAC | 27 | 32 | 59 |
| BA | 37 | 21 | 58 |
| NHBA | 37 | 21 | 58 |
| AA | 18 | 24 | 42 |
| NHAA | 18 | 23 | 41 |
| HIAC | 18 | 21 | 39 |
| HIA | 12 | 15 | 27 |
| HTOM | 6 | 9 | 15 |
| NAC | 5 | 4 | 9 |
| NHNAC | 5 | 4 | 9 |
| HBAC | 0 | 5 | 5 |
| NHNA | 1 | 3 | 4 |
| NA | 1 | 3 | 4 |
| HAAC | 0 | 2 | 2 |
| HAA | 0 | 1 | 1 |
| HNAC | 0 | 0 | 0 |
| HBA | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Pennington County population
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• Dawes County
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[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
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