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
3015243,865Kennesaw
3012642,865Mableton
3006039,125Marietta
3000834,331Marietta
3033934,292Atlanta
3006833,866Marietta
3008226,080Smyrna
3016824,599Austell
3010623,977Austell
301110Clarkdale
300900Marietta

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