Post Offices List in Columbia County, Georgia:
| Appling Post Office | 1849 Appling Harlem Rd, Appling, GA 30802 |
| Evans Post Office | 607 Ronald Reagan Dr, Evans, GA 30809 |
| Grovetown Post Office | 200 John Deere Pkwy, Grovetown, GA 30813 |
| Harlem Post Office | 335 W Milledgeville Rd, Harlem, GA 30814 |
| Martinez Post Office | 125 Commercial Blvd, Augusta, GA 30907 |