ZIP Code 30111 is located in Clarkdale Georgia. Portions of 30111 are also in Austell. 30111 is entirely within Cobb County. Regionally, 30111 is located in the Western Suburbs of Metro Atlanta.
| ZIP Code Name | Clarkdale |
| Primary County | Cobb County |
| ZIP Code Type | PO Box |
| Area Code(s) | 470 / 678 / 770 / 943 |
| Current Time | EST |
| Coordinates | 33.82691956,-84.65293884 |
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| Cities/Towns in 30111 | |
| Region | Metro Atlanta |
| Metropolitan/Micropolitan Stat Area | Atlanta-Sandy Springs-Alpharetta, GA |
| Time Zone | Eastern Standard Time |
| IANA Timezone | America/New_York |
| Area | 0.36240730 Square Miles |
| School Districts in 30111 | |
| Elementary Schools in 30111 | |
| Middle Schools in 30111 | |
| High Schools in 30111 |