Fastest Growing Counties in Indiana (2025)

County
Rank
Change (2020)
2025 Pop.
2020 Pop.
Hancock County115.07%92,26480,180
Boone County212.1%79,74271,137
Hamilton County310.03%384,009348,996
Hendricks County49.87%192,923175,596
Johnson County56.07%172,085162,237
Clark County65.44%127,957121,360
Warrick County74.91%67,13963,996
Morgan County84.63%75,16171,836
Putnam County93.88%38,11336,689
DeKalb County103.87%44,96843,292
Allen County113.69%400,347386,103
Bartholomew County123.65%85,22182,218
Madison County133.52%134,746130,167
Parke County143.52%16,71816,150
Wells County153.25%29,06928,155
White County163.07%25,43124,673
Jasper County173.06%33,91532,908
Montgomery County183.02%39,08137,935
Switzerland County192.99%10,0399,748
Newton County202.92%14,20213,799
Fountain County212.8%16,95316,492
Rush County222.59%17,19716,763
Scott County232.44%24,97124,377
Martin County242.32%10,0379,809
Steuben County252.22%35,20734,441
Ripley County262.21%29,62128,980
Whitley County272.16%35,07234,329
Dearborn County282.16%51,84550,750
Greene County292.12%31,44630,793
Adams County301.99%36,56235,849
Brown County311.94%15,78515,485
Harrison County321.92%40,43839,676
Tippecanoe County331.89%189,902186,387
Daviess County341.86%33,97633,357
Warren County351.84%8,5788,423
Porter County361.73%176,309173,318
Benton County371.47%8,8438,715
Franklin County381.47%23,12222,788
Owen County391.43%21,62221,318
LaGrange County401.16%41,01340,542
Jennings County411.15%27,89827,580
Carroll County421.02%20,54720,339
Spencer County431%20,03219,833
Howard County440.97%84,40183,589
Jackson County450.95%46,92046,479
Floyd County460.83%81,18580,519
Delaware County470.78%112,637111,762
Noble County480.76%47,82247,460
Lake County490.71%502,480498,957
Jefferson County500.59%33,29633,100
Shelby County510.57%45,31545,060
Sullivan County520.56%20,92920,812
Knox County530.56%36,45836,256
Henry County540.52%49,15748,903
Clay County550.5%26,56026,427
Marshall County560.5%46,30046,071
St. Joseph County570.48%273,980272,682
Cass County580.37%37,92437,786
Perry County590.3%19,21319,155
Huntington County600.26%36,74336,646
Grant County610.16%66,61466,507
Vigo County620.16%106,295106,130
Washington County630.12%28,27328,238
Dubois County640.03%43,65443,642
Vanderburgh County65-0.02%180,304180,336
Vermillion County66-0.16%15,38515,409
Fayette County67-0.22%23,30823,359
Kosciusko County68-0.22%79,96480,141
Lawrence County69-0.5%44,79045,016
Monroe County70-0.57%138,784139,585
Fulton County71-0.64%20,33820,469
Orange County72-0.7%19,71219,850
Decatur County73-0.7%26,28926,474
LaPorte County74-0.71%111,474112,270
Elkhart County75-0.73%205,481206,991
Starke County76-0.79%23,21223,396
Wayne County77-0.84%65,94966,507
Marion County78-1%966,934976,659
Gibson County79-1.03%32,70833,049
Posey County80-1.04%24,92425,185
Union County81-1.37%6,9857,082
Clinton County82-1.59%32,65233,178
Pike County83-1.77%12,03212,249
Tipton County84-1.78%15,11815,392
Ohio County85-1.86%5,8185,928
Randolph County86-1.91%23,94824,415
Wabash County87-1.97%30,32630,934
Pulaski County88-2.06%12,25712,515
Blackford County89-2.18%11,84112,105
Miami County90-2.21%35,11435,906
Crawford County91-2.32%10,28010,524
Jay County92-3%19,86020,474

Indiana County Growth Overview

Indiana's counties show varied growth patterns from 2020 to 2025. Hancock County leads with 15.07% annualized growth, followed by Boone County (12.1%) and Hamilton County (10.03%). The largest counties are Marion County (966,934), Lake County (502,480), and Allen County (400,347). Of the 92 counties in Indiana, 64 are growing while 28 have experienced population decline. Overall, counties averaged 1.39% annualized growth, with total population growing by 1.96% annually.