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US ZIP Code Profile

ZIP Code 31523
Brunswick, Georgia

ZIP code 31523 is in Brunswick, located in Glynn County, Georgia, within the Brunswick metro area. Its 2020 Census population was 14,803. The estimated median adjusted gross income per tax return is $51,838, and about 6% of filers report $200,000 or more.

2020 Population
14,803
Census ZCTA
County
Glynn
FIPS 13127
Median income (est.)
$51,838
IRS SOI 2022
Land Area
185.036 mi²
+ 13.063 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
Coordinates31.212645, -81.61681
Land / Water Area185.036 mi² land · 13.063 mi² water

02Income & Economics

Distribution of the 7,110 individual tax returns filed in 31523 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
27.9%
$25K–$50K
21.1%
$50K–$75K
14.3%
$75K–$100K
10.4%
$100K–$200K
20.4%
$200K+
5.9%
The $200,000+ bracket accounts for 27% of 31523's total adjusted gross income, from 6% of returns — a concentration that drives the gap between the median ($51,838) 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 31523's IRS income metrics, 2020–2022.

Median income (2021→2022)
$51,838
▲ 8.6%
Filers earning $200K+
5.9%
▲ 0.9 pt
Total filers
7,110
▲ 1.7%
GET /zipc/v2/zipcodes/31523/soi?year=… $45K 2020 $48K 2021 $52K 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 31523 ZCTA.

2000
8,621
 
2010
13,229
▲ +53.5%
2020
14,803
▲ +11.9%

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 AliasesBrunswick

06Frequently Asked Questions

What county is ZIP code 31523 in?

ZIP code 31523 is in Glynn County, Georgia (county FIPS code 13127).

What city is ZIP code 31523?

The primary USPS city for 31523 is Brunswick, GA.

What metro area (MSA) is 31523 in?

31523 is part of the Brunswick, GA Metro Area (MSA code 15260).

What is the population of ZIP code 31523?

The 2020 Census population of 31523 was 14,803 residents.

What is the median income in ZIP code 31523?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 31523 is about $51,838, with around 6% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.