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

Gwinnett County ZIP Codes

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

County State ZIP Code City Area Codes
Gwinnett County GA 30044 Lawrenceville 470, 678, 770, 943
Gwinnett County GA 30045 Lawrenceville 470, 678, 770, 943
Gwinnett County GA 30046 Lawrenceville 470, 678, 770, 943
Gwinnett County GA 30047 Lilburn 470, 678, 770, 943
Gwinnett County GA 30048 Lilburn 678
Gwinnett County GA 30049 Lawrenceville 678
Gwinnett County GA 30052 Loganville 470, 678, 770, 943
Gwinnett County GA 30071 Norcross 470, 678, 770, 943
Gwinnett County GA 30078 Snellville 470, 678, 770, 943
Gwinnett County GA 30091 Norcross 678
Page 2 of 3

Geographic Map of Gwinnett 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.