Belmont County, Ohio

County seat: St. Clairsville · Population 64,434 (2025) · 532 sq mi

Belmont County is the 38th most populous of Ohio's 88 counties, with 64,434 people (2025 estimate). Its county seat is St. Clairsville. The map shows its 16 cities and towns and the 7 neighboring counties.

Map of Belmont County, Ohio with cities, towns and the county boundary
Belmont County, Ohio with its cities and towns, unincorporated communities (CDPs) and neighboring counties. Boundaries: U.S. Census Bureau, 2025. Free to use with attribution (CC BY 4.0).
Download PDF (Letter) 114 KBPNG image 82 KBOhio county map

Belmont County facts

County seat
St. Clairsville
Population (2025 estimate)
64,434 −3.1% since 2020
Land area
532 sq mi 18th largest of 88
Water area
9 sq mi
Population density
121 per sq mi
Established
1801
Largest city
Martins Ferry 6,048
Median household income
$57,017
Cities and towns
16 plus 8 CDPs
ZIP codes
29
Time zone
Eastern
FIPS code
39013

Cities and towns in Belmont County

Belmont County has 16 incorporated cities, towns and villages. Populations count the people living inside Belmont County; cities that cross a county line also list the other counties.

NameTypePopulation 2025Also in
Martins FerryCity6,048
St. Clairsville (county seat)City4,926
BarnesvilleVillage3,861
BellaireVillage3,738
ShadysideVillage3,334
BridgeportVillage1,523
Powhatan PointVillage1,407
BethesdaVillage1,179
FlushingVillage803
BrooksideVillage523
YorkvilleVillage411Jefferson County
BelmontVillage399
HollowayVillage325
MorristownVillage237
WilsonVillage47Monroe County
FairviewVillage0Guernsey County

Unincorporated communities (CDPs)

Census-designated places are communities without their own city government; the county provides their services.

CommunityPopulationAlso in
Wolfhurst1,058
Neffs921
Lansing523
Lloydsville475
Blaine296
Glencoe255
Bannock198
Lafferty93

ZIP codes in Belmont County

29 ZIP codes reach into Belmont County. ZIP codes ignore county lines, so some also cover a neighboring county.

Population of Belmont County, 2020–2025

Belmont County shrank by 2,061 people (−3.1%) between April 2020 and July 2025: 2,362 more deaths than births and a net gain of 308 people from migration.

Year (July 1)Population
202066,285
202165,878
202265,382
202365,003
202464,764
202564,434

Neighboring counties

Printable Belmont County map

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Sources

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