Residential delivery area · Georgia
ZIP Code 31558: Saint Marys, GA
ZIP code 31558 uses the postal name Saint Marys, Georgia and lies entirely in Camden County (Census 2020 ZIP-county file). About 23,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $74,268 (Census Bureau, ACS 2020-2024). By Census place, its land lies in St. Marys (32%) and Kings Bay Base (2%); 66% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Saint Marys · its only residential ZIP
- County
- Camden County
- Census places
- St. Marys (32%); Kings Bay Base (2%) census-designated place
- Neighborhoods
- Admirals Walk, Harbor Pines, Quail Hollow, Riverview GeoNames
- Micro area
- Kingsland, GA
- House district
- GA-1 119th Congress
- State
- Georgia
- Time zone
- Eastern
- Land area
- 71.6 sq mi · 315 people per sq mi
Where is ZIP code 31558?
31558 centers on 30.802°, -81.508° and covers 71.6 square miles of land plus 22.1 of water. It borders 5 ZIP codes: 31547, 31548, 32097, 32034, 31569.
The map draws ZIP code areas only. For the streets inside 31558, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0); neighborhoods from the GeoNames gazetteer (CC BY 4.0), placed in this ZIP code by PlainZIP.
How does 31558 compare with the rest of Camden County?
| Measure | 31558 | In Camden County | In GA |
|---|---|---|---|
| People (ACS 2020-2024) | 22,591 | 2nd of 8 | 193rd of 751 |
| Median household income | $74k | 2nd of 4 | 192nd of 476 |
| Median home value | $297k | 1st of 4 | 170th of 474 |
Its median household income is higher than in 54% of U.S. residential ZIP codes, and it is denser than 67% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 31558?
The 2020 Census counted 21,348 people in 31558; the ACS, which samples households over 2020-2024, estimates 22,591. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 22,591
- 2020 Census count
- 21,348
- Households
- 8,625
- Median age
- 33.0
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 31558?
Of the 22,591 people the ACS estimates in 31558, 26.5% are under 18 and 15.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (70.1%), then Black (not Hispanic) (13.4%).
- Under 1826.5%
- 18 to 6458.1%
- 65 and older15.4%
- White, not Hispanic70.1%
- Black, not Hispanic13.4%
- Hispanic or Latino8.4%
- Other or two or more6.6%
- Asian, not Hispanic1.6%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 31558 earn?
Median household income is $74,268 (ACS 2020-2024), the 2nd highest of the 4 ranked ZIP codes in Camden County.
- Median household income
- $74,268
- Income per person
- $35,708
- Below the poverty line
- 17.7%
- Unemployed (of the labor force)
- 8.3%
- Adults 25+ with a bachelor's degree
- 27.1%
- Adjusted gross income per tax return, 2022
- $71,7049,250 returns; wages 67% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 31558?
FHFA's house price index for 31558, built from repeat sales and appraisals of the same homes, rose 96% from 2015 to 2025 and rose 52% from 2020 to 2025, and moved −7.1% in 2025.
- Median home value (owners' estimate)
- $297,000
- Median gross rent
- $1,265
- Homes owned by their occupants
- 58.8%
- Housing units
- 9,321
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 31558?
395 business establishments had a location in this ZIP code in 2023, 27 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance66
- Retail trade60
- Other services (except public administration)51
- Accommodation and food services48
- Professional, scientific, and technical services37
- Finance and insurance27
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 31558?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 31547 | Kings Bay | 1,419 | – | 1.8 mi |
| 31548 | Kingsland | 24,070 | $76k | 12.2 mi |
| 32097 | Yulee, FL | 26,700 | $93k | 12.8 mi |
| 32034 | Fernandina Beach, FL | 41,029 | $99k | 13.9 mi |
| 31569 | Woodbine | 5,506 | $66k | 16.4 mi |
| 31527 | Jekyll Island | 769 | – | 19.6 mi (near) |
| 31565 | Waverly | 2,409 | $62k | 20.2 mi (near) |
| 32226 | Jacksonville, FL | 21,256 | $110k | 22.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.