Fastest Growing Counties in Ohio (2026)

County
Rank
Change (2020) ↓
2026 Pop.
2020 Pop.
Union County119.88%75,63363,090
Delaware County215.46%248,434215,162
Pickaway County39.69%64,34658,664
Fairfield County47.88%172,026159,464
Madison County57.75%47,25743,858
Warren County67.31%261,019243,236
Franklin County75.03%1,391,1031,324,505
Licking County84.93%187,614178,796
Greene County94.9%176,371168,130
Miami County104.67%114,054108,962
Morrow County114.67%36,61534,983
Lorain County124.54%327,764313,534
Clermont County134.41%217,965208,755
Butler County144.23%407,440390,887
Brown County153.49%45,20843,684
Knox County163.29%64,85662,792
Hamilton County172.23%848,959830,418
Portage County182.17%165,367161,854
Athens County192.14%63,71662,380
Defiance County202.07%39,05838,267
Holmes County212.01%45,12644,236
Highland County221.88%44,17943,364
Coshocton County231.86%37,27736,595
Adams County241.74%27,92927,451
Medina County251.65%185,645182,639
Perry County261.23%35,89235,455
Mercer County271.21%43,04842,532
Wood County281.01%133,605132,267
Van Wert County291.01%29,21128,919
Montgomery County300.85%541,703537,139
Ashland County310.8%52,89452,476
Muskingum County320.76%87,12286,464
Champaign County330.68%39,00738,743
Preble County340.64%41,27741,016
Hancock County350.58%75,35474,919
Pike County360.57%27,22927,076
Jackson County370.49%32,83132,671
Stark County380.43%376,169374,552
Shelby County390.27%48,28648,154
Lake County400.27%233,152232,527
Sandusky County410.25%59,02858,878
Summit County420.23%541,072539,835
Clinton County430.19%42,11342,035
Logan County440.11%46,16546,114
Noble County450.07%14,11714,107
Paulding County460.01%18,80918,807
Guernsey County47-0.04%38,40538,419
Geauga County48-0.08%95,30895,385
Marion County49-0.18%65,27265,390
Seneca County50-0.22%54,93455,055
Wayne County51-0.24%116,626116,903
Clark County52-0.3%135,485135,894
Richland County53-0.35%124,553124,988
Henry County54-0.56%27,51827,672
Darke County55-0.72%51,52251,897
Ashtabula County56-0.74%96,79497,512
Trumbull County57-0.74%200,192201,682
Crawford County58-0.76%41,69642,015
Putnam County59-0.86%34,11034,407
Huron County60-0.87%57,98858,495
Fayette County61-1.01%28,68428,978
Lucas County62-1.04%426,393430,870
Hardin County63-1.07%30,39430,722
Fulton County64-1.07%42,18242,640
Mahoning County65-1.16%225,382228,017
Tuscarawas County66-1.17%92,11093,199
Allen County67-1.22%100,896102,137
Vinton County68-1.32%12,63912,808
Cuyahoga County69-1.44%1,244,4241,262,635
Williams County70-1.49%36,53037,084
Auglaize County71-1.6%45,73046,473
Gallia County72-1.74%28,73029,240
Ross County73-2.09%75,45877,068
Ottawa County74-2.13%39,43840,298
Columbiana County75-2.42%99,195101,650
Jefferson County76-2.64%63,46865,186
Wyandot County77-2.81%21,25021,864
Washington County78-2.83%57,97059,656
Erie County79-2.93%73,27375,482
Morgan County80-2.97%13,34413,752
Carroll County81-3.11%25,87226,702
Hocking County82-3.18%27,15328,046
Belmont County83-3.28%64,11666,291
Scioto County84-3.8%71,04273,852
Monroe County85-3.99%12,82313,356
Lawrence County86-5.04%55,21158,141
Harrison County87-5.05%13,76014,492
Meigs County88-5.56%20,92922,160

Ohio Counties Growth Overview

Ohio's counties show varied growth patterns from 2020 to 2026. Union County leads with 3.07% annualized growth, followed by Delaware County (2.43%) and Pickaway County (1.55%). The largest counties are Franklin County (1,391,103), Cuyahoga County (1,244,424), and Hamilton County (848,959). Of the 88 counties in Ohio, 46 are growing while 42 have experienced population decline. Overall, counties averaged 0.11% annualized growth, with total population growing by 0.28% annually.

Change (2020)

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