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US ZIP Code Profile

ZIP Code 31305
Darien, Georgia

ZIP code 31305 is in Darien, located in Mcintosh County, Georgia, within the Brunswick metro area. Its 2020 Census population was 4,401. The estimated median adjusted gross income per tax return is $38,362, and about 4% of filers report $200,000 or more.

2020 Population
4,401
Census ZCTA
County
Mcintosh
FIPS 13191
Median income (est.)
$38,362
IRS SOI 2022
Land Area
42.547 mi²
+ 3.644 mi² water

01Location & Geography

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

Primary CityDarien, GA
CountyMcintosh County (FIPS 13191)
StateGeorgia (FIPS 13)
Metro Area (MSA)Brunswick, GA Metro Area (15260)
Census Region / DivisionSouth Region · South Atlantic Division
Coordinates31.396816, -81.39396
Land / Water Area42.547 mi² land · 3.644 mi² water

02Income & Economics

Distribution of the 2,320 individual tax returns filed in 31305 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
36.6%
$25K–$50K
25.0%
$50K–$75K
13.8%
$75K–$100K
8.2%
$100K–$200K
12.5%
$200K+
3.9%
The $200,000+ bracket accounts for 25% of 31305's total adjusted gross income, from 4% of returns — a concentration that drives the gap between the median ($38,362) 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 31305's IRS income metrics, 2020–2022.

Median income (2021→2022)
$38,362
▲ 9.3%
Filers earning $200K+
3.9%
▲ 0.8 pt
Total filers
2,320
▲ 2.7%
GET /zipc/v2/zipcodes/31305/soi?year=… $32K 2020 $35K 2021 $38K 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 31305 ZCTA.

2000
5,171
 
2010
5,989
▲ +15.8%
2020
4,401
▼ -26.5%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number122387
City AliasesDarien

06Frequently Asked Questions

What county is ZIP code 31305 in?

ZIP code 31305 is in Mcintosh County, Georgia (county FIPS code 13191).

What city is ZIP code 31305?

The primary USPS city for 31305 is Darien, GA.

What metro area (MSA) is 31305 in?

31305 is part of the Brunswick, GA Metro Area (MSA code 15260).

What is the population of ZIP code 31305?

The 2020 Census population of 31305 was 4,401 residents.

What is the median income in ZIP code 31305?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 31305 is about $38,362, with around 4% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.