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US ZIP Code Profile

ZIP Code 39556
Kiln, Mississippi

ZIP code 39556 is in Kiln, located in Hancock County, Mississippi, within the Gulfport-Biloxi-Pascagoula metro area. Its 2020 Census population was 7,403. The estimated median adjusted gross income per tax return is $41,616, and about 2% of filers report $200,000 or more.

2020 Population
7,403
Census ZCTA
County
Hancock
FIPS 28045
Median income (est.)
$41,616
IRS SOI 2022
Land Area
105.196 mi²
+ 1.4 mi² water

01Location & Geography

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

Primary CityKiln, MS
CountyHancock County (FIPS 28045)
StateMississippi (FIPS 28)
Metro Area (MSA)Gulfport-Biloxi-Pascagoula, MS Metro Area (25060)
Census Region / DivisionSouth Region · East South Central Division
Coordinates30.44153, -89.43997
Land / Water Area105.196 mi² land · 1.4 mi² water

02Income & Economics

Distribution of the 3,070 individual tax returns filed in 39556 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
32.2%
$25K–$50K
26.7%
$50K–$75K
13.7%
$75K–$100K
9.8%
$100K–$200K
15.3%
$200K+
2.3%
The $200,000+ bracket accounts for 15% of 39556's total adjusted gross income, from 2% of returns — a concentration that drives the gap between the median ($41,616) 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 39556's IRS income metrics, 2020–2022.

Median income (2021→2022)
$41,616
▲ 6.9%
Filers earning $200K+
2.3%
▼ 0.3 pt
Total filers
3,070
▼ 0.3%
GET /zipc/v2/zipcodes/39556/soi?year=… $36K 2020 $39K 2021 $42K 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 39556 ZCTA.

2000
4,445
 
2010
7,705
▲ +73.3%
2020
7,403
▼ -3.9%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number273913
City AliasesKiln

06Frequently Asked Questions

What county is ZIP code 39556 in?

ZIP code 39556 is in Hancock County, Mississippi (county FIPS code 28045).

What city is ZIP code 39556?

The primary USPS city for 39556 is Kiln, MS.

What metro area (MSA) is 39556 in?

39556 is part of the Gulfport-Biloxi-Pascagoula, MS Metro Area (MSA code 25060).

What is the population of ZIP code 39556?

The 2020 Census population of 39556 was 7,403 residents.

What is the median income in ZIP code 39556?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 39556 is about $41,616, 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.