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ZIP codes in Cobb County

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

65

ZIP codes

11

cross the county line

1,056,559

people in these ZIPs

159

counties in GA

Most people

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Cobb County ZIP list

More counties in Georgia

All 159 counties in Georgia

Questions people actually ask

How many ZIP codes are in Cobb County, Georgia?

65 ZIP codes reach into Cobb County, including 40 PO Box or single-address ZIPs placed by the town they serve. 11 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Cobb County has the most people?

30127 (Powder Springs) has about 71,626 residents, the most of any ZIP touching Cobb County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Cobb 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 Cobb 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