What is the largest city in Clark County, OH?

Springfield is the largest city or town in Clark County, with about 58,190 residents.

How many ZIP codes are in Clark County?

Clark County includes 16 ZIP Code Tabulation Areas, including 43010, 45316, 45319, 45323, 45341.

What is the population of Clark County, OH?

About 135,158 people live in Clark County, based on American Community Survey 5-year estimates.

What counties border Clark County?

Clark County borders Montgomery County, Greene County, Miami County, Madison County, Champaign County.

Clark County, OH: Cities, ZIP Codes & Local Data

Population

135,158

Land area

396sq mi

People per sq mi

341

ZIP codes

16

Clark County at a glance

Households here earn a median of $63,132 a year, 12% less than the Ohio figure of $71,389.
A typical owner-occupied home is valued at $169,900 (21% below Ohio) and median rent is $872 a month.
The biggest population centers are Springfield (58,190), Northridge (7,817) and New Carlisle (5,544).

Local data for Clark County, OH

Counts from official public data

Housing and community stats

Clark County, OH, American Community Survey 2020-2024

Full profile

Median household income

$63,132

Poverty rate

15.2%

Median home value

$169,900

Prices +4.7% in a year

Median rent

$872/mo

Homeownership

69.4%

Bachelor's or higher

20.2%

Median age

41.2

Average commute

23.1 min

Largest reported origins and ancestries: German Americans (25,472), Irish Americans (17,429), Italian Americans (3,768).

Home values and rents Income, education and commute

Economy and federal money

Jobs, income, federal spending and pandemic loans

Details

Unemployment rate

3.8%

Sep 2026, -1.4 pts in a year

Average annual pay

$53,261

45,578 jobs, 2025

Income per person

$52,869

BEA, 2024

Federal spending

$874M

FY 2026, $6,428 per person

PPP loans

$197M

2,815 loans, 23,398 jobs reported

Campaign donations

$448K

Itemized, 2026 cycle

Economy Federal spending PPP loans

How people get to work

Clark County, OH, workers 16 and older. American Community Survey 5-year estimates

Drove alone78.5%
Carpooled8.8%
Public transit0.3%
Walked1.9%
Bicycle0.2%
Taxi, ride-hailing, motorcycle or other0.6%
Worked from home9.6%

Average one-way commute: 23.1 minutes for people who do not work from home.

Environment and hazard risk

Clark County, OH, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Low

Top: ice storm

Storm events since 1996

592

Most often thunderstorm wind

Flood insurance policies

275

0.5% of homes, county

July high / Jan low

84° / 19°F

40.3 inches of rain a year

Hazards, floods and storm history Check a flood zone 31 historic places

Health statistics

Share of adults in Clark County, OH, CDC PLACES estimates

All 40 measures

Obesity

42.2%

U.S. 33.3% +8.9 pts

Diabetes

15.0%

U.S. 12.1% +2.9 pts

Smoking

17.9%

U.S. 12.8% +5.1 pts

Uninsured (18-64)

8.9%

U.S. 11.1% -2.2 pts

Cities, towns and ZIP codes in Clark County

Population shown

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Frequently asked questions

What is the largest city in Clark County, OH?: Springfield is the largest city or town in Clark County, with about 58,190 residents.
How many ZIP codes are in Clark County?: Clark County includes 16 ZIP Code Tabulation Areas, including 43010, 45316, 45319, 45323, 45341.
What is the population of Clark County, OH?: About 135,158 people live in Clark County, based on American Community Survey 5-year estimates.
What counties border Clark County?: Clark County borders Montgomery County, Greene County, Miami County, Madison County, Champaign County.