What is the largest city in Clermont County, OH?

Amelia is the largest city or town in Clermont County, with about 12,871 residents.

How many ZIP codes are in Clermont County?

Clermont County includes 15 ZIP Code Tabulation Areas, including 45102, 45103, 45106, 45112, 45120.

What is the population of Clermont County, OH?

About 211,181 people live in Clermont County, based on American Community Survey 5-year estimates.

What counties border Clermont County?

Clermont County borders Hamilton County, Warren County, Campbell County, KY, Brown County, Clinton County, Pendleton County, KY, Bracken County, KY.

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

Population

211,181

Land area

453sq mi

People per sq mi

467

ZIP codes

15

Clermont County at a glance

Clermont County is 61% denser than Ohio as a whole.
It is the 14th most populous of 88 counties in Ohio.
Households here earn a median of $85,510 a year, 20% more than the Ohio figure of $71,389.
A typical owner-occupied home is valued at $266,200 (24% above Ohio) and median rent is $1,107 a month.
The biggest population centers are Amelia (12,871), Withamsville (7,429) and Milford (6,497).

Local data for Clermont County, OH

Counts from official public data

Housing and community stats

Clermont County, OH, American Community Survey 2020-2024

Full profile

Median household income

$85,510

Poverty rate

9.1%

Median home value

$266,200

Prices +6.6% in a year

Median rent

$1,107/mo

Homeownership

73.6%

Bachelor's or higher

31.6%

Median age

40.8

Average commute

28.1 min

Largest reported origins and ancestries: German Americans (60,533), Irish Americans (29,102), Italian Americans (8,246).

Home values and rents Income, education and commute

Economy and federal money

Jobs, income, federal spending and pandemic loans

Details

Unemployment rate

3.5%

Aug 2026, -0.7 pts in a year

Average annual pay

$59,965

63,011 jobs, 2025

Income per person

$66,235

BEA, 2024

Federal spending

$1.45B

FY 2026, $6,942 per person

PPP loans

$351M

4,095 loans, 41,198 jobs reported

Campaign donations

$853K

Itemized, 2026 cycle

Economy Federal spending PPP loans

How people get to work

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

Drove alone78.0%
Carpooled6.4%
Public transit0.3%
Walked0.8%
Bicycle0.1%
Taxi, ride-hailing, motorcycle or other0.8%
Worked from home13.6%

Average one-way commute: 28.1 minutes for people who do not work from home.

Environment and hazard risk

Clermont County, OH, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Low

Top: lightning

Storm events since 1996

769

Most often thunderstorm wind

Flood insurance policies

270

0.4% of homes, county

July high / Jan low

87° / 22°F

Hazards, floods and storm history Check a flood zone 16 historic places

Health statistics

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

All 40 measures

Obesity

34.7%

U.S. 33.3% +1.4 pts

Diabetes

12.6%

U.S. 12.1% +0.5 pts

Smoking

15.6%

U.S. 12.8% +2.8 pts

Uninsured (18-64)

7.2%

U.S. 11.1% -3.9 pts

Cities, towns and ZIP codes in Clermont County

Population shown

Frequently asked questions

What is the largest city in Clermont County, OH?: Amelia is the largest city or town in Clermont County, with about 12,871 residents.
How many ZIP codes are in Clermont County?: Clermont County includes 15 ZIP Code Tabulation Areas, including 45102, 45103, 45106, 45112, 45120.
What is the population of Clermont County, OH?: About 211,181 people live in Clermont County, based on American Community Survey 5-year estimates.
What counties border Clermont County?: Clermont County borders Hamilton County, Warren County, Campbell County, KY, Brown County, Clinton County, Pendleton County, KY, Bracken County, KY.