19 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 30127 | Powder Springs | 71,626 |
| 30101 | Acworth | 62,593 |
| 30062 | Marietta | 62,284 |
| 30066 | Marietta | 61,761 |
| 30144 | Kennesaw | 59,661 |
| 30080 | Smyrna | 53,316 |
| 30064 | Marietta | 52,125 |
| 30067 | Marietta | 47,271 |
| 30152 | Kennesaw | 44,977 |
| 30126 | Mableton | 41,829 |
| 30060 | Marietta | 38,499 |
| 30008 | Marietta | 35,547 |
| 30339 | Atlanta | 35,372 |
| 30068 | Marietta | 33,882 |
| 30082 | Smyrna | 27,296 |
| 30168 | Austell | 26,612 |
| 30106 | Austell | 23,107 |
| 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).