County ZIP codes · Mississippi · FIPS 28001
Adams County, MS ZIP Codes
Adams County, Mississippi has 6 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 2 residential and 4 for PO boxes or a single organization. 1 of the residential ones lie mainly in Adams County and 1 mainly in a neighboring county; 2 cross the county line.
- ACS2020-24
- Census2020
Where are the ZIP codes of Adams County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All 2 residential ZIP codes in Adams County
1 ZIP code lies mainly in Adams County; 1 more reaches into it from a neighboring county and follows the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 39120 | Natchez | 29,039 | 60 | $44k | $107k | 87% |
Partly in Adams County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 39661 | Roxie | 2,251 | 9 | $63k | $87k | 17% |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
2 ZIP codes of Adams County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Adams | Elsewhere |
|---|---|---|
| 39120 | 87% | Jefferson County 13% |
| 39661 | 17% | Franklin County 83% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Adams County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Adams County's ZIP codes use 2 prefixes: 391 and 396.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.