ZIP codes

ZIP codes in Richland County, Ohio

Richland County has 19 ZIP codes. 5 lie entirely inside it and 14 are shared with neighboring counties, so part of their land and their people are elsewhere. About 126,592 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 19; With 1% or more of their land inside
Entirely inside: 5; 99% or more of their land
Shared with other counties: 14; Most with Ashland County (6)
Most populated ZIP: 44903; 25,642 people · Mansfield
Least populated ZIP: 44843; 2,445 people · Lucas; 1 more with nobody living there
Largest ZIP by land: 44903; 114 sq mi · Mansfield

Map of the ZIP codes in Richland County

Entirely in the county (99% or more of its land)
Shared, mostly in this county
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in Richland County

19 ZIP codes in Richland County, OH, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
43019	Fredericktown	9,445	2.7%	≈ 362
44805	Ashland	30,805	5.2%	≈ 500
44813	Bellville	8,994	86%	≈ 7,707
44822	Butler	3,995	59%	≈ 2,432
44827	Crestline	6,993	22%	≈ 1,770
44833	Galion	15,892	8.3%	≈ 953
44837	Greenwich	4,738	17%	≈ 709
44843	Lucas	2,445	97%	≈ 2,380
44864	Perrysville	3,336	25%	≈ 806
44865	Plymouth	3,287	44%	≈ 1,012
44875	Shelby	14,144	93%	≈ 13,947
44878	Shiloh	2,712	90%	≈ 2,409
44901	Mansfield	0	100%	0
44902	Mansfield	4,636	100%	4,636
44903	Mansfield	25,642	95%	≈ 25,222
44904	Lexington	13,450	62%	≈ 11,810
44905	Mansfield	16,245	100%	16,245
44906	Mansfield	17,343	100%	17,343
44907	Mansfield	16,349	100%	16,349

ZIP codes shared with other counties

These 14 ZIP codes have part of their land in another county. The first figure is the share of their land in Richland County; then, where the rest lies.

43019 (Fredericktown): 2.7% here; 69% in Knox County and 29% in Morrow County.
44805 (Ashland): 5.2% here; 95% in Ashland County.
44813 (Bellville): 86% here; 9.1% in Morrow County and 4.9% in Knox County.
44822 (Butler): 59% here; 41% in Knox County.
44827 (Crestline): 22% here; 78% in Crawford County.
44833 (Galion): 8.3% here; 44% in Morrow County, 42% in Crawford County, and 5.5% in Marion County.
44837 (Greenwich): 17% here; 65% in Huron County and 19% in Ashland County.
44843 (Lucas): 97% here; 3.2% in Ashland County.
44864 (Perrysville): 25% here; 75% in Ashland County.
44865 (Plymouth): 44% here; 46% in Huron County and 9.5% in Crawford County.
44875 (Shelby): 93% here; 6.8% in Crawford County.
44878 (Shiloh): 90% here; 5.9% in Huron County and 4.3% in Ashland County.
44903 (Mansfield): 95% here; 3.6% in Morrow County and 1.0% in Ashland County.
44904 (Lexington): 62% here; 38% in Morrow County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Mansfield (6), Ashland (1), Bellville (1), Butler (1), Crestline (1), and Fredericktown (1); 14 places in all.

They start with 3 different three-digit prefixes, one per USPS sorting center: 430, 448, and 449.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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