| ZIP Codes: | 8 ZIP Codes (5 Standard, 2 PO Box, 1 Unique) [See All] |
| Area Code: | 912 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 11:53:02 PM |
| Population: | 85,286 [See All] |
| FIPS: | 13127 |
| CBSA: | Brunswick-St. Simons, GA |
| Land Area: | 432 sq mi |
| Water Area: | 50 sq mi |
| Coordinates: | 31.1974, -81.4673 |
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85,286 residents live across 8 ZIPs covering 432 sq mi, served by 4 distinct USPS-recognized cities.
Population moved from 80,819 to 85,286 from 2014 to 2024 — a +5.5% change. 5 ZIPs gained residents, 1 lost (and 1 held flat).
The county's wealthiest ZIP 31522 (Saint Simons Island, $108,632 median) and poorest ZIP 31520 (Brunswick, $40,071) are 7.4 miles apart — a 2.7× income gap across local geography.
Median home values vary 4.0× across this county — from $147,500 in 31520 (Brunswick) to $590,000 in 31527 (Jekyll Island).
Density varies 15× across the county — from 39 people/sq mi in 31527 (Jekyll Island) to 608 in 31520 (Brunswick).
Educational attainment ranges from 17.3% bachelor's+ in 31520 (Brunswick) to 80.4% in 31527 (Jekyll Island) — the breadth of educational profiles across the area.
Within Georgia, this is the #32 most populous of 161 counties and ranks #3 for median household income with the #62 fastest decade growth .
Hosts 1 single-entity Unique ZIP: 31524Fed Law Enforcement Trng Ctr .
Weighted by population, the typical household earns about $73,717 across the county — reflecting what a typical resident sees, not a simple ZIP average.
32.5% of adults age 25+ hold a bachelor's degree or higher (19,832 of 61,076 reporting).
5 Standard delivery, 2 PO Box only, 1 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 31525 | Brunswick | Standard | 28,926 | $69,493 | 110.0 | 0.7% |
| 31520 | Brunswick | Standard | 22,313 | $40,071 | 36.7 | 0.7% |
| 31522 | Saint Simons Island | Standard | 17,780 | $108,632 | 66.1 | 18.2% |
| 31523 | Brunswick | Standard | 15,402 | $88,988 | 195.7 | 10.4% |
| 31527 | Jekyll Island | Standard | 769 | — | 19.5 | 23.8% |
| 31561 | Sea Island | PO Box | 96 | $250,001 | 4.2 | -70.5% |
| 31524 | Brunswick | Unique | 0 | — | 0.3 | — |
| 31521 | Brunswick | PO Box | — | — | 0.0 | — |