There are 19 zip codes in Cobb County, Georgia. The most populated is 30127, located in Powder Springs. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
3012771,642Powder Springs
3006262,958Marietta
3010162,284Acworth
3006660,795Marietta
3014458,836Kennesaw
3008053,116Smyrna
3006450,997Marietta
3006746,595Marietta
3010243,870Acworth
3015243,865Kennesaw
3012642,865Mableton
3006039,125Marietta
3000834,331Marietta
3006833,866Marietta
3008226,080Smyrna
3016824,599Austell
3010623,977Austell
30111Clarkdale
30090Marietta
showing: 19 rows

Zip Codes in Cobb County, Georgia by Population (2024)