Last official estimated population of Brown County was 36,626 (year 2014)[1]. This was 0.011% of total US population and 4.3% of total South Dakota state population. Area of Brown County is 1,731.0 mi² (=4483.1 km²), in this year population density was 21.16 p/mi². If population growth rate would be same as in period 2010-2014 (+0.06%/yr), Brown County population in 2024 would be 36,865 [0].
Historical population of Brown 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] +47.2 %/yr
[1890-1900] -0.97 %/yr
[1900-1910] +5.4 %/yr
[1910-1920] +1.33 %/yr
[1920-1930] +0.64 %/yr
[1930-1940] -0.58 %/yr
[1940-1950] +0.95 %/yr
[1950-1960] +0.45 %/yr
[1960-1970] +0.8 %/yr
[1970-1980] +0.01 %/yr
[1980-1990] -0.38 %/yr
[1990-2000] -0.03 %/yr
[2000-2005] -0.02 %/yr
[2005-2010] +0.61 %/yr
[2010-2014] +0.06 %/yr
Looking for settlements in Brown County? Visit this page: Settlements in Brown County, SD
Population of Brown County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1351 | 1258 | 2,609 |
| 5 to 9 | 1369 | 1276 | 2,645 |
| 10 to 14 | 1214 | 1207 | 2,421 |
| 15 to 19 | 1252 | 1312 | 2,564 |
| 20 to 24 | 1322 | 1412 | 2,734 |
| 25 to 29 | 1440 | 1225 | 2,665 |
| 30 to 34 | 1303 | 1208 | 2,511 |
| 35 to 39 | 1063 | 1023 | 2,086 |
| 40 to 44 | 1081 | 1036 | 2,117 |
| 45 to 49 | 1139 | 1020 | 2,159 |
| 50 to 54 | 1357 | 1378 | 2,735 |
| 55 to 59 | 1292 | 1376 | 2,668 |
| 60 to 64 | 1134 | 1209 | 2,343 |
| 65 to 69 | 843 | 881 | 1,724 |
| 70 to 74 | 572 | 683 | 1,255 |
| 75 to 79 | 478 | 642 | 1,120 |
| 80 to 84 | 324 | 545 | 869 |
| 85+ | 384 | 799 | 1,183 |
Brown 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 | 18425 | 19042 | 37,467 |
| WAC | 17533 | 18146 | 35,679 |
| WA | 17198 | 17821 | 35,019 |
| NHWAC | 17097 | 17772 | 34,869 |
| NHWA | 16792 | 17478 | 34,270 |
| IAC | 774 | 924 | 1,698 |
| NHIAC | 718 | 849 | 1,567 |
| IA | 562 | 705 | 1,267 |
| NHIA | 526 | 654 | 1,180 |
| H | 493 | 448 | 941 |
| AAC | 417 | 434 | 851 |
| NHAAC | 410 | 430 | 840 |
| BAC | 515 | 310 | 825 |
| HWAC | 436 | 374 | 810 |
| NHBAC | 485 | 283 | 768 |
| HWA | 406 | 343 | 749 |
| AA | 354 | 381 | 735 |
| NHAA | 351 | 379 | 730 |
| TOM | 351 | 351 | 702 |
| NHTOM | 320 | 319 | 639 |
| BA | 413 | 204 | 617 |
| NHBA | 396 | 184 | 580 |
| HIAC | 56 | 75 | 131 |
| NAC | 46 | 44 | 90 |
| NHNAC | 45 | 43 | 88 |
| HIA | 36 | 51 | 87 |
| NHNA | 40 | 28 | 68 |
| NA | 40 | 28 | 68 |
| HTOM | 31 | 32 | 63 |
| HBAC | 30 | 27 | 57 |
| HBA | 17 | 20 | 37 |
| HAAC | 7 | 4 | 11 |
| HAA | 3 | 2 | 5 |
| HNAC | 1 | 1 | 2 |
| HNA | 0 | 0 | 0 |
• Spink County population
46 mi, 
179°
• Day County
40.7 mi, 
113°
• Dickey County
36.5 mi, 
349°
• Marshall County
38.6 mi, 
74°
• LaMoure County
61 mi, 352°
• Edmunds County
43.1 mi, 
253°
• Sargent County
49.9 mi, 
44°
• Clark County
59.2 mi, 
148°
• McPherson County
43.6 mi, 
287°
• Faulk County
53.1 mi, 
227°
[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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