Fastest Growing Counties in South Dakota (2025)

County
Rank
Change (2020)
2025 Pop.
2020 Pop.
Lincoln County118.31%77,66665,648
Lawrence County214.84%29,67925,844
Custer County311.69%9,3098,335
Pennington County48.7%119,097109,566
Minnehaha County57.79%213,100197,695
Brookings County67.61%36,95834,343
Turner County77.26%9,3058,675
Butte County86.96%11,00910,293
Hamlin County96.47%6,5656,166
Fall River County105.95%7,3856,970
Meade County115.21%31,45829,899
Sully County124.62%1,5181,451
Clay County134.61%15,69115,000
Stanley County144.17%3,0952,971
Moody County153.96%6,5866,335
McCook County163.9%5,8915,670
Codington County173.84%29,44128,351
Clark County183.76%3,9983,853
Douglas County193.74%2,9402,834
Faulk County203.61%2,2092,132
Union County213.34%17,42316,860
Beadle County223.3%19,79719,165
Aurora County233.18%2,8222,735
Marshall County243.16%4,4444,308
Sanborn County252.79%2,3912,326
Dewey County262.2%5,3405,225
Grant County271.98%7,6877,538
Yankton County281.89%23,72723,286
Lake County291.78%11,21311,017
Brule County301.72%5,3315,241
Tripp County311.68%5,7055,611
Perkins County321.48%2,8842,842
Bon Homme County331.39%7,0676,970
Kingsbury County341.37%5,2705,199
Gregory County351.32%4,0564,003
Deuel County361.05%4,3404,295
Edmunds County371.03%4,0293,988
Haakon County381.02%1,8851,866
Roberts County390.88%10,34010,250
Hutchinson County400.73%7,4807,426
Jerauld County410.49%1,6561,648
Buffalo County420.26%1,9441,939
Lyman County430.03%3,7053,704
Davison County44-0.02%19,95219,956
Hanson County45-0.23%3,4553,463
Day County46-0.75%5,4035,444
Harding County47-1.07%1,2941,308
Walworth County48-1.11%5,2355,294
Charles Mix County49-1.2%9,2569,368
Hughes County50-1.3%17,51017,740
Hand County51-1.37%3,0973,140
Miner County52-1.48%2,2702,304
Todd County53-2.06%9,1319,323
Brown County54-2.17%37,39738,225
Oglala Lakota County55-2.65%13,28613,648
Bennett County56-4.1%3,2493,388
Corson County57-4.7%3,7123,895
Spink County58-4.7%6,0426,340
Jackson County59-4.82%2,6642,799
Campbell County60-4.93%1,3101,378
Potter County61-5.1%2,3472,473
Mellette County62-5.89%1,8071,920
Hyde County63-7.2%1,1601,250
McPherson County64-7.99%2,2102,402
Ziebach County65-9.06%2,1782,395
Jones County66-11.99%815926

South Dakota County Growth Overview

South Dakota's counties show varied growth patterns from 2020 to 2025. Lincoln County leads with 18.31% annualized growth, followed by Lawrence County (14.84%) and Custer County (11.69%). The largest counties are Minnehaha County (213,100), Pennington County (119,097), and Lincoln County (77,666). Of the 66 counties in South Dakota, 43 are growing while 23 have experienced population decline. Overall, counties averaged 1.35% annualized growth, with total population growing by 5.67% annually.