ZIP Codes of Guernsey County, OH

Population & People
Population & People
Total Population
39,253
Household Income
Household Income
Median Income
$61,700
Housing
Housing
Total Housing Units
19,278
Business & Economy
Business & Economy
Total Businesses
831
Employment
Employment
Employment Rate
53.35%
Education
Education
Bachelor's Degree+
15.80%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 14 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:14 ZIP Codes (9 Standard, 5 PO Box, 0 Unique) [See All]
Area Codes:220 / 740
Timezone:Eastern (GMT -05:00)
Local Time:11:54:38 PM
Population:39,253 [See All]
FIPS:39059
CBSA:Cambridge, OH
Land Area:612 sq mi
Water Area:12 sq mi
Coordinates:39.9843, -81.4731
Quick Link:
https://www.zip-codes.com/county/oh-guernsey.asp
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Ohio's #62 most populous county
39,253 residents across 14 ZIPs — #62 of 88 Ohio counties.

Standout ZIPs in this County


Most Populous
Cambridge · 19,453 people
49.6% of county total
Highest Income
Cumberland · $72,500 median
1.2× county average
Largest Land Area
Cambridge · 129.6 sq mi
Spans the most ground
Fastest Growth
Senecaville · 27.1% (10-yr)
1,979 → 2,515 residents
Most Educated
Cambridge · 18.4% bachelor's+
2,582 of 14,070 adults 25+

Things worth knowing about Guernsey County


39,253 residents live across 14 ZIPs covering 612 sq mi, served by 14 distinct USPS-recognized cities.

Population moved from 40,343 to 39,253 from 2014 to 2024 — a -2.7% change. 3 ZIPs gained residents, 11 lost.

The county's wealthiest ZIP 43732 (Cumberland, $72,500 median) and poorest ZIP 43772 (Pleasant City, $47,344) are 6.9 miles apart — a 1.5× income gap across local geography.

Median home values vary 1.7× across this county — from $110,800 in 43723 (Byesville) to $187,500 in 43778 (Salesville).

Density varies 593× across the county — from 22 people/sq mi in 43732 (Cumberland) to 12,788 in 43768 (Old Washington).

Educational attainment ranges from 10.9% bachelor's+ in 43773 (Quaker City) to 18.4% in 43725 (Cambridge) — the breadth of educational profiles across the area.

Within Ohio, this is the #62 most populous of 88 counties and ranks #71 for median household income .

Weighted by population, the typical household earns about $58,932 across the county — reflecting what a typical resident sees, not a simple ZIP average.

15.8% of adults age 25+ hold a bachelor's degree or higher (4,333 of 27,427 reporting).

9 Standard delivery, 5 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Guernsey County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
612
square miles
Avg density
64.2
people per sq mi
Population
39,253
across 14 ZIPs
Cambridge
129.6 sq mi
19,453 residents
Quaker City
108.7 sq mi
2,546 residents
Kimbolton
103.6 sq mi
2,764 residents

All ZIP Codes in Guernsey County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
43725CambridgeStandard19,453$57,835129.6-2.3%
43723ByesvilleStandard4,472$51,47415.9-6.7%
43749KimboltonStandard2,764$65,565103.6-4.9%
43773Quaker CityStandard2,546$52,826108.7-19.7%
43780SenecavilleStandard2,515$66,08045.427.1%
43732CumberlandStandard1,813$72,50084.0-0.8%
43755Lore CityStandard1,750$68,58140.620.3%
43772Pleasant CityStandard1,544$47,34436.8-8.1%
43778SalesvilleStandard1,378$65,55646.0-8.6%
43722BuffaloPO Box6170.1103.0%
43768Old WashingtonPO Box211$64,0630.0-31.5%
43750KiplingPO Box1101.0-23.6%
43733DerwentPO Box660.0-76.7%
43736FairviewPO Box14$66,8750.0-82.3%

Adjacent & Nearby Counties