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US ZIP Code Profile

ZIP Code 31788
Moultrie, Georgia

ZIP code 31788 is in Moultrie, located in Colquitt County, Georgia, within the Moultrie metro area. Its 2020 Census population was 11,283. The estimated median adjusted gross income per tax return is $34,956, and about 3% of filers report $200,000 or more.

2020 Population
11,283
Census ZCTA
County
Colquitt
FIPS 13071
Median income (est.)
$34,956
IRS SOI 2022
Land Area
128.671 mi²
+ 1.753 mi² water

01Location & Geography

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

Primary CityMoultrie, GA
CountyColquitt County (FIPS 13071)
StateGeorgia (FIPS 13)
Metro Area (MSA)Moultrie, GA Micro Area (34220)
Census Region / DivisionSouth Region · South Atlantic Division
Coordinates31.11144, -83.676796
Land / Water Area128.671 mi² land · 1.753 mi² water

02Income & Economics

Distribution of the 3,860 individual tax returns filed in 31788 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
38.3%
$25K–$50K
29.3%
$50K–$75K
11.9%
$75K–$100K
7.5%
$100K–$200K
10.1%
$200K+
2.9%
The $200,000+ bracket accounts for 20% of 31788's total adjusted gross income, from 3% of returns — a concentration that drives the gap between the median ($34,956) 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 31788's IRS income metrics, 2020–2022.

Median income (2021→2022)
$34,956
▲ 10.3%
Filers earning $200K+
2.9%
▼ 0.2 pt
Total filers
3,860
▼ 2.5%
GET /zipc/v2/zipcodes/31788/soi?year=… $30K 2020 $32K 2021 $35K 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 31788 ZCTA.

2010
10,602
 
2020
11,283
▲ +6.4%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number126127
City AliasesMoultrie

06Frequently Asked Questions

What county is ZIP code 31788 in?

ZIP code 31788 is in Colquitt County, Georgia (county FIPS code 13071).

What city is ZIP code 31788?

The primary USPS city for 31788 is Moultrie, GA.

What metro area (MSA) is 31788 in?

31788 is part of the Moultrie, GA Micro Area (MSA code 34220).

What is the population of ZIP code 31788?

The 2020 Census population of 31788 was 11,283 residents.

What is the median income in ZIP code 31788?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 31788 is about $34,956, with around 3% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.