County ZIP codes · Georgia · FIPS 13207
Monroe County, GA ZIP Codes
Monroe County, Georgia has 11 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 10 residential and 1 for PO boxes or a single organization. 4 of the residential ones lie mainly in Monroe County and 6 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $62,805 in 30204 (Barnesville) to $88,434 in 31220 (Macon) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Monroe County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $64,214 and $76,334.
They carry 9 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 10 residential ZIP codes in Monroe County
4 ZIP codes lie mainly in Monroe County; 6 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 31029 | Forsyth | 19,403 | 80 | $76k | $248k | 100% |
| 31046 | Juliette | 3,637 | 44 | $96k | $274k | 70% |
| 31016 | Culloden | 1,885 | 18 | – | $185k | 44% |
| 31004 | Bolingbroke | no residents | 0 | – | – | 100% |
Partly in Monroe County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 31220 | Macon | 16,494 | 342 | $88k | $193k | 45% |
| 31210 | Macon | 33,288 | 805 | $78k | $286k | 25% |
| 31066 | Musella | 803 | 13 | $62k | $241k | 6% |
| 30233 | Jackson | 24,730 | 167 | $74k | $253k | 5% |
| 30204 | Barnesville | 13,616 | 109 | $63k | $189k | 4% |
| 31097 | Yatesville | 1,372 | 26 | $64k | $169k | 2% |
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?
8 ZIP codes of Monroe County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Monroe | Elsewhere |
|---|---|---|
| 31210 | 25% | Bibb County 75% |
| 30233 | 5% | Butts County 87%; Henry County 4%; Lamar County 3% |
| 31220 | 45% | Bibb County 55% |
| 30204 | 4% | Lamar County 92%; Upson County 4% |
| 31046 | 70% | Jones County 30% |
| 31016 | 44% | Upson County 34%; Crawford County 18%; Lamar County 5% |
| 31097 | 2% | Upson County 87%; Lamar County 11% |
| 31066 | 6% | Crawford County 93%; Bibb County 1% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 31086 | Smarr |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Monroe County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Monroe County's ZIP codes use 3 prefixes: 302, 310 and 312.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 302 | Atlanta, GA (SCF 303) | 2 | 65 |
| 310 | Macon, GA (SCF 310) | 7 | 92 |
| 312 | Macon, GA (SCF 310) | 2 | 20 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.