19 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 30127 | Powder Springs | 72,126 |
| 30062 | Marietta | 63,105 |
| 30101 | Acworth | 62,871 |
| 30066 | Marietta | 60,961 |
| 30144 | Kennesaw | 58,389 |
| 30080 | Smyrna | 53,334 |
| 30064 | Marietta | 51,321 |
| 30067 | Marietta | 46,436 |
| 30152 | Kennesaw | 44,432 |
| 30126 | Mableton | 43,047 |
| 30060 | Marietta | 39,313 |
| 30008 | Marietta | 35,598 |
| 30339 | Atlanta | 34,872 |
| 30068 | Marietta | 33,040 |
| 30082 | Smyrna | 26,786 |
| 30168 | Austell | 24,768 |
| 30106 | Austell | 22,909 |
| 30111 | Clarkdale | 0 |
| 30090 | Marietta | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 19 ZCTAs in Cobb County, Georgia (US Census).