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US ZIP Code Profile

ZIP Code 31520
Brunswick, Georgia

ZIP code 31520 is in Brunswick, located in Glynn County, Georgia, within the Brunswick metro area. Its 2020 Census population was 22,726. The estimated median adjusted gross income per tax return is $27,823, and about 2% of filers report $200,000 or more.

2020 Population
22,726
Census ZCTA
County
Glynn
FIPS 13127
Median income (est.)
$27,823
IRS SOI 2022
Land Area
16.826 mi²
+ 1.771 mi² water

01Location & Geography

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

Primary CityBrunswick, GA
CountyGlynn County (FIPS 13127)
StateGeorgia (FIPS 13)
Metro Area (MSA)Brunswick, GA Metro Area (15260)
Census Region / DivisionSouth Region · South Atlantic Division
Coordinates31.18092, -81.49397
Land / Water Area16.826 mi² land · 1.771 mi² water

02Income & Economics

Distribution of the 8,340 individual tax returns filed in 31520 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
46.6%
$25K–$50K
29.7%
$50K–$75K
10.7%
$75K–$100K
5.4%
$100K–$200K
6.0%
$200K+
1.6%
The $200,000+ bracket accounts for 24% of 31520's total adjusted gross income, from 2% of returns — a concentration that drives the gap between the median ($27,823) 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 31520's IRS income metrics, 2020–2022.

Median income (2021→2022)
$27,823
▲ 14.8%
Filers earning $200K+
1.6%
▲ 0.3 pt
Total filers
8,340
▼ 1.8%
GET /zipc/v2/zipcodes/31520/soi?year=… $23K 2020 $24K 2021 $28K 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 31520 ZCTA.

2000
21,796
 
2010
22,336
▲ +2.5%
2020
22,726
▲ +1.7%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number121188
City AliasesAltama, Brunswick, Sears

06Frequently Asked Questions

What county is ZIP code 31520 in?

ZIP code 31520 is in Glynn County, Georgia (county FIPS code 13127).

What city is ZIP code 31520?

The primary USPS city for 31520 is Brunswick, GA.

What metro area (MSA) is 31520 in?

31520 is part of the Brunswick, GA Metro Area (MSA code 15260).

What is the population of ZIP code 31520?

The 2020 Census population of 31520 was 22,726 residents.

What is the median income in ZIP code 31520?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 31520 is about $27,823, with around 2% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.