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US ZIP Code Profile

ZIP Code 31522
Saint Simons Island, Georgia

ZIP code 31522 is in Saint Simons Island, located in Glynn County, Georgia, within the Brunswick metro area. Its 2020 Census population was 16,892. The estimated median adjusted gross income per tax return is $87,654, and about 21% of filers report $200,000 or more.

2020 Population
16,892
Census ZCTA
County
Glynn
FIPS 13127
Median income (est.)
$87,654
IRS SOI 2022
Land Area
54.058 mi²
+ 18.069 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CitySaint Simons Island, GA
CountyGlynn County (FIPS 13127)
StateGeorgia (FIPS 13)
Metro Area (MSA)Brunswick, GA Metro Area (15260)
Census Region / DivisionSouth Region · South Atlantic Division
Coordinates31.257252, -81.342026
Land / Water Area54.058 mi² land · 18.069 mi² water

02Income & Economics

Distribution of the 8,740 individual tax returns filed in 31522 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
19.4%
$25K–$50K
14.4%
$50K–$75K
11.4%
$75K–$100K
9.3%
$100K–$200K
24.5%
$200K+
20.9%
The $200,000+ bracket accounts for 66% of 31522's total adjusted gross income, from 21% of returns — a concentration that drives the gap between the median ($87,654) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 31522's IRS income metrics, 2020–2022.

Median income (2021→2022)
$87,654
▲ 1.4%
Filers earning $200K+
20.9%
▲ 0.1 pt
Total filers
8,740
▼ 2.0%
GET /zipc/v2/zipcodes/31522/soi?year=… $74K 2020 $86K 2021 $88K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 31522 ZCTA.

2000
14,697
 
2010
14,447
▼ -1.7%
2020
16,892
▲ +16.9%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypeBranch
Carrier Route SortD
USPS Finance Number121188
City AliasesSt Simons Island, Saint Simons Is, Brunswick, Saint Simons Island, St Simons Is

06Frequently Asked Questions

What county is ZIP code 31522 in?

ZIP code 31522 is in Glynn County, Georgia (county FIPS code 13127).

What city is ZIP code 31522?

The primary USPS city for 31522 is Saint Simons Island, GA.

What metro area (MSA) is 31522 in?

31522 is part of the Brunswick, GA Metro Area (MSA code 15260).

What is the population of ZIP code 31522?

The 2020 Census population of 31522 was 16,892 residents.

What is the median income in ZIP code 31522?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 31522 is about $87,654, with around 21% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.