Last official estimated population of Brookings County was 32,020 (year 2014)[1]. This was 0.01% of total US population and 3.7% of total South Dakota state population. Area of Brookings County is 804.9 mi² (=2084.8 km²), in this year population density was 39.78 p/mi². If population growth rate would be same as in period 2010-2014 (+0.04%/yr), Brookings County population in 2024 would be 32,158 [0].
Historical population of Brookings County for period 1870-2014 [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
[1870-1880] +40.73 %/yr
[1880-1890] +7.39 %/yr
[1890-1900] +2.17 %/yr
[1900-1910] +1.22 %/yr
[1910-1920] +1.29 %/yr
[1920-1930] +0.44 %/yr
[1930-1940] -0.17 %/yr
[1940-1950] +0.75 %/yr
[1950-1960] +1.17 %/yr
[1960-1970] +1.01 %/yr
[1970-1980] +0.94 %/yr
[1980-1990] +0.35 %/yr
[1990-2000] +1.14 %/yr
[2000-2005] +0.87 %/yr
[2005-2010] +1.63 %/yr
[2010-2014] +0.04 %/yr
Looking for settlements in Brookings County? Visit this page: Settlements in Brookings County, SD
Population of Brookings County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1031 | 992 | 2,023 |
| 5 to 9 | 909 | 931 | 1,840 |
| 10 to 14 | 842 | 835 | 1,677 |
| 15 to 19 | 1829 | 1885 | 3,714 |
| 20 to 24 | 3514 | 3187 | 6,701 |
| 25 to 29 | 1332 | 939 | 2,271 |
| 30 to 34 | 1075 | 958 | 2,033 |
| 35 to 39 | 884 | 784 | 1,668 |
| 40 to 44 | 792 | 716 | 1,508 |
| 45 to 49 | 765 | 729 | 1,494 |
| 50 to 54 | 849 | 798 | 1,647 |
| 55 to 59 | 835 | 859 | 1,694 |
| 60 to 64 | 776 | 786 | 1,562 |
| 65 to 69 | 538 | 550 | 1,088 |
| 70 to 74 | 377 | 414 | 791 |
| 75 to 79 | 278 | 336 | 614 |
| 80 to 84 | 191 | 262 | 453 |
| 85+ | 187 | 349 | 536 |
Brookings 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 | 16559 | 15920 | 32,479 |
| WAC | 15850 | 15518 | 31,368 |
| WA | 15654 | 15316 | 30,970 |
| NHWAC | 15477 | 15170 | 30,647 |
| NHWA | 15296 | 14983 | 30,279 |
| AAC | 638 | 453 | 1,091 |
| NHAAC | 632 | 444 | 1,076 |
| AA | 561 | 380 | 941 |
| NHAA | 559 | 374 | 933 |
| H | 445 | 390 | 835 |
| HWAC | 373 | 348 | 721 |
| HWA | 358 | 333 | 691 |
| IAC | 305 | 341 | 646 |
| BAC | 403 | 211 | 614 |
| NHIAC | 265 | 315 | 580 |
| NHBAC | 362 | 191 | 553 |
| BA | 348 | 157 | 505 |
| NHBA | 313 | 139 | 452 |
| IA | 214 | 227 | 441 |
| TOM | 209 | 221 | 430 |
| NHTOM | 193 | 206 | 399 |
| NHIA | 182 | 209 | 391 |
| HIAC | 40 | 26 | 66 |
| HBAC | 41 | 20 | 61 |
| HBA | 35 | 18 | 53 |
| HIA | 32 | 18 | 50 |
| NAC | 27 | 18 | 45 |
| NHNAC | 25 | 16 | 41 |
| HTOM | 16 | 15 | 31 |
| NA | 18 | 9 | 27 |
| NHNA | 16 | 9 | 25 |
| HAAC | 6 | 9 | 15 |
| HAA | 2 | 6 | 8 |
| HNAC | 2 | 2 | 4 |
| HNA | 2 | 0 | 2 |
• Codington County population
45.3 mi, 
334°
• Lyon County
47 mi, 
87°
• Lake County
29 mi, 
213°
• Pipestone County
36.6 mi, 
132°
• Moody County
25.9 mi, 
166°
• Hamlin County
28.2 mi, 
318°
• Lincoln County
26 mi, 85°
• Kingsbury County
34.7 mi, 
268°
• Deuel County
26.8 mi, 
11°
• Miner County
47 mi, 
238°
[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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