U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

42,735 verified records
All states and U.S. territories
Maps and coordinates
County directory

Clark County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Clark County.

County State ZIP Code City Area Codes
Clark County OH 45341 Medway 326, 937
Clark County OH 45344 New Carlisle 326, 937
Clark County OH 45349 North Hampton 326, 937
Clark County OH 45368 South Charleston 220, 326, 740, 937
Clark County OH 45369 South Vienna 220, 326, 740, 937
Clark County OH 45372 Tremont City 326, 937
Clark County OH 45501 Springfield 326, 937
Clark County OH 45502 Springfield 326, 937
Clark County OH 45503 Springfield 326, 937
Clark County OH 45504 Springfield 326, 937
Page 20 of 25

Geographic Map of Clark County

Postal context

About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.