• county
  • FIPS 39023
  • Largest town: Springfield

Clark County, Ohio

Clark County had 134,985 residents in the Census Vintage 2024 estimate, on 395.9 square miles of land. It ranks 21st of 88 in Ohio by population and 83rd by land area.

Population
134,985
#21 of 88 in Ohio · #489 in US
Area
395.9 sq mi
#83 of 88 in Ohio · #2,546 in US
Density
341 / sq mi
#17 of 88 in Ohio · #392 in US
Median household income
$58,684
#65 of 88 in Ohio · #1,972 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Clark County within Ohio. Pin: Columbus.

Measure from here

Tools and pages that start from Clark County

Clark County population, land area and income

Clark County had 134,985 residents in the Census Vintage 2024 estimate, on 395.9 square miles of land. It ranks 21st of 88 in Ohio by population and 83rd by land area. That works out to 341.0 people per square mile, 3.5 times the US average of 96.3, and in the top quarter nationally.

The median county-equivalent in Ohio has 58,250 residents, so Clark County is 2.3 times that size.

Its SAIPE 2023 median household income of $58,684 is below the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

134,985

3144th1st

489th of 3,144 (US)

Land area

396 sq mi

3144th1st

2546th of 3,144 (US)

Density

341.0 / sq mi

3144th1st

392nd of 3,144 (US)

Median household income

$58,684

3143rd1st

1972nd of 3,143 (US)

Rank within Ohio (88)

Population

134,985

88th1st

21st of 88 (OH)

Land area

396 sq mi

88th1st

83rd of 88 (OH)

Density

341.0 / sq mi

88th1st

17th of 88 (OH)

Median household income

$58,684

88th1st

65th of 88 (OH)

How Clark County's population changed since 2020

Clark County lost 909 residents between the July 2020 and July 2024 estimates, a drop of 0.7%. That ranks 57th of 88 in Ohio for growth. The median Ohio county changed by -0.2%, and the state as a whole by +0.7%.

Since the April 2020 estimates base, Clark County recorded 6,493 births and 8,665 deaths, a natural change of -2,172. Net international migration added +1,023 and net domestic migration, people moving to or from other US counties, came to +117. The largest single component was natural change, which removed 2,172 people.

135.9k2020135.5k2021134.7k2022134.7k2023135.0k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
6,493
Deaths
8,665
Net international migration
+1,023
Net domestic migration
+117
Change, July 2023 to July 2024
+250

Where Clark County is

The Census internal point of Clark County is at 39.917000, -83.783700. It sits in UTM zone 17N. The map shades Ohio's 88 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Clark County outlined. Dots are towns of 1,000+ people with residents in it.

Shelby County: -0.4%Defiance County: +1.0%Darke County: -0.8%Seneca County: -0.6%Wood County: +0.6%Fayette County: -0.7%Clark County: -0.7%Hocking County: -2.2%Jackson County: +0.2%Miami County: +2.7%Richland County: -0.1%Union County: +13.7%Auglaize County: -1.2%Hancock County: +0.1%Morgan County: -1.6%Van Wert County: -0.1%Hardin County: -1.0%Paulding County: -0.3%Portage County: +1.2%Delaware County: +10.6%Harrison County: -3.1%Ross County: -1.3%Crawford County: -0.9%Clinton County: -0.0%Henry County: -0.5%Pike County: -0.0%Cuyahoga County: -1.7%Highland County: +1.0%Knox County: +1.7%Ottawa County: -1.5%Huron County: -0.6%Erie County: -2.2%Holmes County: +1.0%Lawrence County: -4.0%Marion County: -0.6%Fairfield County: +5.2%Putnam County: -0.6%Guernsey County: -0.5%Vinton County: -2.1%Gallia County: -1.2%Trumbull County: -0.7%Wayne County: -0.2%Perry County: +0.6%Ashland County: -0.1%Fulton County: -1.4%Brown County: +1.4%Lucas County: -1.1%Stark County: -0.1%Medina County: +1.1%Belmont County: -2.4%Williams County: -1.4%Mahoning County: -1.0%Noble County: +1.1%Greene County: +2.5%Preble County: -0.5%Allen County: -1.2%Athens County: +1.3%Jefferson County: -2.0%Adams County: +0.8%Monroe County: -2.3%Washington County: -2.2%Logan County: -0.1%Franklin County: +2.4%Warren County: +5.3%Wyandot County: -2.1%Licking County: +3.4%Hamilton County: +0.8%Clermont County: +2.6%Butler County: +2.2%Coshocton County: +1.1%Geauga County: -0.0%Sandusky County: -0.0%Ashtabula County: -0.6%Carroll County: -0.9%Tuscarawas County: -1.2%Morrow County: +2.7%Montgomery County: +0.1%Mercer County: +0.3%Lake County: -0.1%Pickaway County: +6.0%Madison County: +3.8%Muskingum County: +0.1%Meigs County: -3.0%Columbiana County: -1.8%Lorain County: +2.7%Scioto County: -2.8%Champaign County: +0.4%Summit County: -0.3%
Change 2020 to 2024
  1. < -1.4%
  2. < -0.6%
  3. < -0.0%
  4. < +1.1%
  5. ≥ +1.1%
no data

Orange pin: Clark County internal point. Dark pin: Columbus.

Internal point

Decimal
39.917000, -83.783700
DMS
39°55'1.20"N 83°47'1.32"W
UTM
17N 262080.1E 4422255.4N
Geohash
dph7j6wt6
Plus code
86FRW688+RG

Towns in Clark County

4 incorporated places of 1,000+ people have residents in Clark County, 67,792 people together, or 50% of the county. Each figure counts only the part of the town inside Clark County; towns marked "part" extend into another county. The largest is Springfield with 58,138.

  1. 01Springfield58,138
  2. 02New Carlisle5,511
  3. 03Enon2,448
  4. 04South Charleston1,695
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Clark County

The Census 2024 county adjacency file lists 5 neighbors for Clark County. The most populous is Montgomery County, OH, with 537,443 residents. Distances run between Census internal points in a straight line.

Distance to Columbus and the nearest big city

Columbus is 41.6 miles E of Clark County's internal point in a straight line. The nearest place of 100,000 or more is Dayton, OH (population 136,346), 23.9 miles away. The nearest place of 10,000 or more is Springfield, OH (population 58,138), 1.0 miles away.

Clark County FIPS code

The FIPS code of Clark County is 39023: state code 39 for Ohio plus county code 023. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $58,684.

Questions people ask

What is the population of Clark County, Ohio?

The Census Vintage 2024 estimate for July 1, 2024 is 134,985. That is down 909 people (0.7%) from the July 2020 estimate of 135,894.

What is the FIPS code of Clark County?

39023. The first two digits (39) are Ohio; the last three (023) identify the county.

What is the largest town in Clark County?

Springfield, with 58,138 residents inside Clark County in 2024.

Which counties border Clark County?

5 county-equivalents border it in the Census 2024 adjacency file: Montgomery County, OH; Greene County, OH; Miami County, OH; Madison County, OH; Champaign County, OH.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.