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US ZIP Code Profile

ZIP Code 31312
Guyton, Georgia

ZIP code 31312 is in Guyton, located in Effingham County, Georgia, within the Savannah metro area. Its 2020 Census population was 24,401. The estimated median adjusted gross income per tax return is $60,000, and about 5% of filers report $200,000 or more.

2020 Population
24,401
Census ZCTA
County
Effingham
FIPS 13103
Median income (est.)
$60,000
IRS SOI 2022
Land Area
159.806 mi²
+ 0.617 mi² water

01Location & Geography

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

Primary CityGuyton, GA
CountyEffingham County (FIPS 13103)
StateGeorgia (FIPS 13)
Metro Area (MSA)Savannah, GA Metro Area (42340)
Census Region / DivisionSouth Region · South Atlantic Division
Coordinates32.30762, -81.40384
Land / Water Area159.806 mi² land · 0.617 mi² water

02Income & Economics

Distribution of the 11,540 individual tax returns filed in 31312 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
22.9%
$25K–$50K
20.5%
$50K–$75K
16.5%
$75K–$100K
12.8%
$100K–$200K
22.7%
$200K+
4.6%
The $200,000+ bracket accounts for 20% of 31312's total adjusted gross income, from 5% of returns — a concentration that drives the gap between the median ($60,000) 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 31312's IRS income metrics, 2020–2022.

Median income (2021→2022)
$60,000
▲ 9.0%
Filers earning $200K+
4.6%
▲ 1.1 pt
Total filers
11,540
▲ 2.1%
GET /zipc/v2/zipcodes/31312/soi?year=… $51K 2020 $55K 2021 $60K 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 31312 ZCTA.

2000
10,911
 
2010
16,443
▲ +50.7%
2020
24,401
▲ +48.4%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number123894
City AliasesGuyton, Marlow, Pineora

06Frequently Asked Questions

What county is ZIP code 31312 in?

ZIP code 31312 is in Effingham County, Georgia (county FIPS code 13103).

What city is ZIP code 31312?

The primary USPS city for 31312 is Guyton, GA.

What metro area (MSA) is 31312 in?

31312 is part of the Savannah, GA Metro Area (MSA code 42340).

What is the population of ZIP code 31312?

The 2020 Census population of 31312 was 24,401 residents.

What is the median income in ZIP code 31312?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 31312 is about $60,000, with around 5% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.