County ZIP codes · Georgia · FIPS 13127
Glynn County, GA ZIP Codes
Glynn County, Georgia has 10 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 9 residential and 1 for PO boxes or a single organization. 7 of the residential ones lie mainly in Glynn County and 2 mainly in a neighboring county; 2 cross the county line. Median household income ranges from $40,071 in 31520 (Brunswick) to $108,632 in 31522 (Saint Simons Island) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Glynn 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 $60,703 and $88,988.
They carry 6 postal town names: Brunswick, Saint Simons Island, Hortense, Waynesville, Jekyll Island, Sea Island.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 9 residential ZIP codes in Glynn County
7 ZIP codes lie mainly in Glynn County; 2 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 31525 | Brunswick | 28,926 | 294 | $70k | $216k | 100% |
| 31520 | Brunswick | 22,313 | 1,108 | $40k | $148k | 100% |
| 31522 | Saint Simons Island | 17,780 | 333 | $109k | $571k | 100% |
| 31523 | Brunswick | 15,402 | 80 | $89k | $310k | 100% |
| 31527 | Jekyll Island | 769 | 79 | – | $590k | 100% |
| 31561 | Sea Island | 96 | 20 | $250k+ | $2M+ | 100% |
| 31524 | Brunswick | no residents | 0 | – | – | 100% |
Partly in Glynn County
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 Glynn County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Glynn | Elsewhere |
|---|---|---|
| 31543 | 8% | Brantley County 50%; Wayne County 42% |
| 31566 | 14% | Brantley County 79%; Camden County 7% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 31521 | Brunswick |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Glynn County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Glynn County starts with 315.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 315 | Jacksonville, FL (SCF 320) | 10 | 52 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.