Belmont County, Ohio

Belmont County: county in Ohio, United States

About

Belmont County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 70,400 and a population density of 50 people per km². After 10 years in 2020 county had an estimated population of 65,932 inhabitants. Its county seat is St. Clairsville. The county was created 224 years ago in 1801.

Belmont County locator map
Location of Belmont County on Ohio map.

County Snapshot

Belmont County at a glance

Belmont County currently has 18 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.

Browse county places

Mapped populated places

18

These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.

Quick Facts about Belmont County

Population 65,932 (2020)
Country United States of America
State Ohio (United States)
Plate code 07
Area 1402 km2
Water as percent of area 1.7%
Land as percent of area 98.3%
Latitude & Longitude 40.0158,-80.9885
Altitude 1,168 feet / 356 meters
Capital St. Clairsville
Establishment September 07, 1801
Time Zone America/New_York
Local time 20:24:42 (18th April 2026)
Density 47 Pop. per km² as of 2020
Population growth -6.78% (2010-2020)
Weather 79℉ Showers And Thunderstorms Likely 7-days weather
St Clairsville Ohio Courthouse image
St Clairsville Ohio Courthouse image

Geography

Belmont County is located at 40°0'57"N 80°59'19"W (40.0158000, -80.9885400). It has 7 neighbors: Jefferson, Monroe County, Noble County, Marshall County, Guernsey County, Harrison County and Ohio County.

Belmont County map

Click "full screen" full screen map icon to open full mode. View satellite images

The largest city of Belmont County is Colerain with a population of 59,145. Other cities include, Heath population 11,035, Martins Ferry population 6,426, Saint Clairsville population 5,085 and Bellaire population 3,957. See all Belmont County cities & populated places.

Belmont County Populated Places (more)

Cities, towns, neighborhoods & other populated places in Belmont County.

City Name Population Title
Colerain 59,145 The most populous city in Hamilton County, Ohio.
Heath 11,035 City in Ohio, USA
Martins Ferry 6,426 City in Belmont County, Ohio, United States
Saint Clairsville 5,085 Borough of Pennsylvania
Bellaire 3,957 Village in Belmont County, Ohio, United States
Barnesville 3,949 Town in Ohio
Shadyside 3,513 Village in Belmont County, Ohio, United States of America
Farmington 2,563 Township in Trumbull County, Ohio
Kinsman 1,748 Unincorporated community in Trumbull County, Ohio, United States
Powhatan Point 1,502 Village in the United States
Boston 1,277 Human settlement in United States of America
Bethesda 1,198 Village in Belmont County, Ohio USA
Yorkville 996 Human settlement in Ohio, United States of America
Neffs 993 Census-designated place in Belmont County, Ohio
Flushing 821 Human settlement in Belmont County, Ohio, United States of America
Brookside 570 Human settlement in Belmont County, Ohio, United States of America

Weather

79°F
Showers And Thunderstorms Likely
8 to 14 mph S Saturday

A chance of rain showers between 8am and 11am, then showers and thunderstorms likely. Partly sunny, with a high near 79. South wind 8 to 14 mph, with...

7-Day Forecast

Official website of Belmont County

Official Website
  • St. Clairsville

Demographics

According to census records, the population of Belmont County decreased by 6.78% in 10 years.

Year Population % Change Method
2010 70,400 - census
2011 70,122 -0.4% estimation process
2012 69,709 -0.59% estimation process
2013 69,563 -0.21% estimation process
2014 69,367 -0.28% estimation process
2015 68,973 -0.57% estimation process
2016 68,606 -0.53% estimation process
2017 68,002 -0.89% estimation process
2018 67,533 -0.69% estimation process
2019 67,006 -0.79% estimation process
2020 65,932 -1.63% estimation process
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People born in Belmont County (25)

People born in Belmont County, including politician Wilson Shannon, Confederate Army general Bushrod Johnson, author, critic, and playwright from the United States William Dean Howells, .

More notable people

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