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

Cobb County ZIP Codes

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

County State ZIP Code City Area Codes
Cobb County GA 30126 Mableton 404, 470, 678, 770, 943
Cobb County GA 30127 Powder Springs 470, 678, 770, 943
Cobb County GA 30144 Kennesaw 470, 678, 770, 943
Cobb County GA 30152 Kennesaw 470, 678, 770, 943
Cobb County GA 30156 Kennesaw 678
Cobb County GA 30160 Kennesaw 678
Cobb County GA 30168 Austell 404, 470, 678, 770, 943
Cobb County GA 30339 Atlanta 404, 470, 678, 770, 943
Page 3 of 3

Geographic Map of Cobb 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.