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ZIP codes in Gwinnett County

48 ZIPs touch Gwinnett County, Georgia. The blue dashed line is the county border; orange ZIPs reach into it.

48

ZIP codes

16

cross the county line

1,241,282

people in these ZIPs

159

counties in GA

Most people

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Gwinnett County ZIP list

More counties in Georgia

All 159 counties in Georgia

Questions people actually ask

How many ZIP codes are in Gwinnett County, Georgia?

48 ZIP codes reach into Gwinnett County, including 22 PO Box or single-address ZIPs placed by the town they serve. 16 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Gwinnett County has the most people?

30044 (Lawrenceville) has about 101,475 residents, the most of any ZIP touching Gwinnett County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Gwinnett County and another county?

Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in Gwinnett County. For one address, pin the exact spot on the ZIP finder to see its county.

Where does this list come from?

ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.

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Updated 2026-11-10 · Where the data comes from