Lamar County ZIP Codes
Lamar County is a county of Georgia.
- ZIP codes
- 2
- Cities & towns
- 2
- Area codes
- 6
- Land area
- 184 sq mi
Every ZIP code in Lamar County
| ZIP code | City |
|---|---|
| 30204 | Barnesville |
| 30257 | Milner |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Lamar County codes above are listed without a column we would have to invent.
Cities and towns in Lamar County
Area codes covering Lamar County
Telephone and postal boundaries are drawn by different bodies, so these codes overlap the county without matching its edges.
- 404 Area code 404
- 470 Area code 470
- 478 Area code 478
- 678 Area code 678
- 770 Area code 770
- 943 Area code 943
Scope every ZIP code recorded in Lamar County. Source GeoNames US postal codes (2026-07 postal dump), Census 2024 county Gazetteer (2024 Gazetteer) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated . The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.