Business planning by county

Ohio county reference

88 counties and county equivalents in Ohio. Search names or FIPS codes, compare Census geography and keep the original sources with your work.

• Adams County

  Ohio · FIPS 39001

  27,865 residents · 2025 estimate

• Allen County

  Ohio · FIPS 39003

  100,881 residents · 2025 estimate

• Ashland County

  Ohio · FIPS 39005

  52,523 residents · 2025 estimate

• Ashtabula County

  Ohio · FIPS 39007

  96,713 residents · 2025 estimate

• Athens County

  Ohio · FIPS 39009

  63,197 residents · 2025 estimate

• Auglaize County

  Ohio · FIPS 39011

  45,909 residents · 2025 estimate

• Belmont County

  Ohio · FIPS 39013

  64,434 residents · 2025 estimate

• Brown County

  Ohio · FIPS 39015

  44,397 residents · 2025 estimate

• Butler County

  Ohio · FIPS 39017

  400,128 residents · 2025 estimate

• Carroll County

  Ohio · FIPS 39019

  26,475 residents · 2025 estimate

• Champaign County

  Ohio · FIPS 39021

  38,820 residents · 2025 estimate

• Clark County

  Ohio · FIPS 39023

  135,340 residents · 2025 estimate

• Clermont County

  Ohio · FIPS 39025

  216,977 residents · 2025 estimate

• Clinton County

  Ohio · FIPS 39027

  42,301 residents · 2025 estimate

• Columbiana County

  Ohio · FIPS 39029

  99,377 residents · 2025 estimate

• Coshocton County

  Ohio · FIPS 39031

  37,188 residents · 2025 estimate

• Crawford County

  Ohio · FIPS 39033

  41,896 residents · 2025 estimate

• Cuyahoga County

  Ohio · FIPS 39035

  1,232,925 residents · 2025 estimate

• Darke County

  Ohio · FIPS 39037

  51,520 residents · 2025 estimate

• Defiance County

  Ohio · FIPS 39039

  38,292 residents · 2025 estimate

• Delaware County

  Ohio · FIPS 39041

  242,032 residents · 2025 estimate

• Erie County

  Ohio · FIPS 39043

  73,296 residents · 2025 estimate

• Fairfield County

  Ohio · FIPS 39045

  169,752 residents · 2025 estimate

• Fayette County

  Ohio · FIPS 39047

  28,552 residents · 2025 estimate

• Franklin County

  Ohio · FIPS 39049

  1,361,536 residents · 2025 estimate

• Fulton County

  Ohio · FIPS 39051

  41,853 residents · 2025 estimate

• Gallia County

  Ohio · FIPS 39053

  29,072 residents · 2025 estimate

• Geauga County

  Ohio · FIPS 39055

  95,676 residents · 2025 estimate

• Greene County

  Ohio · FIPS 39057

  174,322 residents · 2025 estimate

• Guernsey County

  Ohio · FIPS 39059

  38,379 residents · 2025 estimate

• Hamilton County

  Ohio · FIPS 39061

  838,418 residents · 2025 estimate

• Hancock County

  Ohio · FIPS 39063

  75,034 residents · 2025 estimate

• Hardin County

  Ohio · FIPS 39065

  30,072 residents · 2025 estimate

• Harrison County

  Ohio · FIPS 39067

  14,070 residents · 2025 estimate

• Henry County

  Ohio · FIPS 39069

  27,598 residents · 2025 estimate

• Highland County

  Ohio · FIPS 39071

  43,823 residents · 2025 estimate

• Hocking County

  Ohio · FIPS 39073

  27,512 residents · 2025 estimate

• Holmes County

  Ohio · FIPS 39075

  44,970 residents · 2025 estimate

• Huron County

  Ohio · FIPS 39077

  58,250 residents · 2025 estimate

• Jackson County

  Ohio · FIPS 39079

  32,817 residents · 2025 estimate

• Jefferson County

  Ohio · FIPS 39081

  63,597 residents · 2025 estimate

• Knox County

  Ohio · FIPS 39083

  64,002 residents · 2025 estimate

• Lake County

  Ohio · FIPS 39085

  232,217 residents · 2025 estimate

• Lawrence County

  Ohio · FIPS 39087

  55,710 residents · 2025 estimate

• Licking County

  Ohio · FIPS 39089

  185,564 residents · 2025 estimate

• Logan County

  Ohio · FIPS 39091

  46,302 residents · 2025 estimate

• Lorain County

  Ohio · FIPS 39093

  323,219 residents · 2025 estimate

• Lucas County

  Ohio · FIPS 39095

  423,347 residents · 2025 estimate

• Madison County

  Ohio · FIPS 39097

  46,985 residents · 2025 estimate

• Mahoning County

  Ohio · FIPS 39099

  224,706 residents · 2025 estimate

• Marion County

  Ohio · FIPS 39101

  65,115 residents · 2025 estimate

• Medina County

  Ohio · FIPS 39103

  185,025 residents · 2025 estimate

• Meigs County

  Ohio · FIPS 39105

  21,587 residents · 2025 estimate

• Mercer County

  Ohio · FIPS 39107

  42,737 residents · 2025 estimate

• Miami County

  Ohio · FIPS 39109

  112,634 residents · 2025 estimate

• Monroe County

  Ohio · FIPS 39111

  12,994 residents · 2025 estimate

• Montgomery County

  Ohio · FIPS 39113

  539,598 residents · 2025 estimate

• Morgan County

  Ohio · FIPS 39115

  13,626 residents · 2025 estimate

• Morrow County

  Ohio · FIPS 39117

  36,305 residents · 2025 estimate

• Muskingum County

  Ohio · FIPS 39119

  87,014 residents · 2025 estimate

• Noble County

  Ohio · FIPS 39121

  14,276 residents · 2025 estimate

• Ottawa County

  Ohio · FIPS 39123

  39,481 residents · 2025 estimate

• Paulding County

  Ohio · FIPS 39125

  18,727 residents · 2025 estimate

• Perry County

  Ohio · FIPS 39127

  35,918 residents · 2025 estimate

• Pickaway County

  Ohio · FIPS 39129

  62,978 residents · 2025 estimate

• Pike County

  Ohio · FIPS 39131

  27,061 residents · 2025 estimate

• Portage County

  Ohio · FIPS 39133

  163,404 residents · 2025 estimate

• Preble County

  Ohio · FIPS 39135

  40,664 residents · 2025 estimate

• Putnam County

  Ohio · FIPS 39137

  34,380 residents · 2025 estimate

• Richland County

  Ohio · FIPS 39139

  124,893 residents · 2025 estimate

• Ross County

  Ohio · FIPS 39141

  76,429 residents · 2025 estimate

• Sandusky County

  Ohio · FIPS 39143

  58,655 residents · 2025 estimate

• Scioto County

  Ohio · FIPS 39145

  71,365 residents · 2025 estimate

• Seneca County

  Ohio · FIPS 39147

  54,522 residents · 2025 estimate

• Shelby County

  Ohio · FIPS 39149

  48,065 residents · 2025 estimate

• Stark County

  Ohio · FIPS 39151

  373,771 residents · 2025 estimate

• Summit County

  Ohio · FIPS 39153

  538,376 residents · 2025 estimate

• Trumbull County

  Ohio · FIPS 39155

  198,972 residents · 2025 estimate

• Tuscarawas County

  Ohio · FIPS 39157

  92,373 residents · 2025 estimate

• Union County

  Ohio · FIPS 39159

  73,446 residents · 2025 estimate

• Van Wert County

  Ohio · FIPS 39161

  29,013 residents · 2025 estimate

• Vinton County

  Ohio · FIPS 39163

  12,645 residents · 2025 estimate

• Warren County

  Ohio · FIPS 39165

  257,181 residents · 2025 estimate

• Washington County

  Ohio · FIPS 39167

  58,389 residents · 2025 estimate

• Wayne County

  Ohio · FIPS 39169

  116,758 residents · 2025 estimate

• Williams County

  Ohio · FIPS 39171

  36,549 residents · 2025 estimate

• Wood County

  Ohio · FIPS 39173

  134,176 residents · 2025 estimate

• Wyandot County

  Ohio · FIPS 39175

  21,567 residents · 2025 estimate

Use the county data

Use a county reference when organizing a market-research brief, outreach territory or business calculation. County population gives geographic context; it does not measure the number of qualified customers.

These are geographic reference records, not contact lists or verified sales leads.

Geography: 2025 U.S. Census Gazetteer. Population: Vintage 2025 estimates, July 1, 2025. County equivalents include parishes, boroughs, independent cities and planning regions. Puerto Rico population is not supplied by this population file.