ZIP codes

ZIP codes in Clark County, Ohio

Clark County has 22 ZIP codes. 11 lie entirely inside it and 11 are shared with neighboring counties, so part of their land and their people are elsewhere. About 135,697 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 22; 1 more just touches the border (under 1% of their land)
Entirely inside: 11; 99% or more of their land
Shared with other counties: 11; Most with Greene County (6)
Most populated ZIP: 45503; 32,638 people · Springfield
Least populated ZIP: 45316; 141 people · Clifton; 1 more with nobody living there
Largest ZIP by land: 45502; 115 sq mi · Springfield

Map of the ZIP codes in Clark 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 Clark County

22 ZIP codes in Clark County, OH, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
43010	Catawba	305	100%	305
43044	Mechanicsburg	4,964	15%	≈ 667
43140	London	24,237	1.3%	≈ 210
43153	South Solon	1,112	14%	≈ 345
45314	Cedarville	6,536	1.9%	≈ 106
45316	Clifton	141	54%	≈ 86
45319	Donnelsville	308	100%	308
45323	Enon	4,961	100%	4,961
45324	Fairborn	41,194	22%	≈ 3,002
45341	Medway	3,639	100%	3,639
45344	New Carlisle	16,979	78%	≈ 14,028
45349	North Hampton	234	100%	234
45368	South Charleston	3,889	93%	≈ 3,535
45369	South Vienna	4,120	97%	≈ 3,771
45372	Tremont City	265	100%	265
45387	Yellow Springs	5,285	8.5%	≈ 179
45501	Springfield	0	100%	0
45502	Springfield	17,692	99%	≈ 17,604
45503	Springfield	32,638	100%	32,638
45504	Springfield	16,363	100%	16,363
45505	Springfield	19,826	100%	19,826
45506	Springfield	13,435	100%	13,435

They also touch the county with under 1% of their land, so they aren’t counted: 43078.

ZIP codes shared with other counties

These 11 ZIP codes have part of their land in another county. The first figure is the share of their land in Clark County; then, where the rest lies.

43044 (Mechanicsburg): 15% here; 69% in Champaign County and 16% in Madison County.
43140 (London): 1.3% here; 96% in Madison County and 2.2% in Franklin County.
43153 (South Solon): 14% here; 75% in Madison County, 9.0% in Fayette County, and 2.4% in Greene County.
45314 (Cedarville): 1.9% here; 98% in Greene County.
45316 (Clifton): 54% here; 46% in Greene County.
45324 (Fairborn): 22% here; 78% in Greene County.
45344 (New Carlisle): 78% here; 20% in Miami County and 1.1% in Champaign County.
45368 (South Charleston): 93% here; 6.9% in Greene County.
45369 (South Vienna): 97% here; 3.2% in Madison County.
45387 (Yellow Springs): 8.5% here; 92% in Greene County.
45502 (Springfield): 99% here; 1.4% in Champaign 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 Springfield (6), Catawba (1), Cedarville (1), Clifton (1), Donnelsville (1), and Enon (1); 17 places in all.

They start with 4 different three-digit prefixes, one per USPS sorting center: 430, 431, 453, and 455.

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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