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US ZIP Code Profile

ZIP Code 39645
Liberty, Mississippi

ZIP code 39645 is in Liberty, located in Amite County, Mississippi, within the McComb metro area. Its 2020 Census population was 4,869. The estimated median adjusted gross income per tax return is $40,426, and about 2% of filers report $200,000 or more.

2020 Population
4,869
Census ZCTA
County
Amite
FIPS 28005
Median income (est.)
$40,426
IRS SOI 2022
Land Area
320.981 mi²
+ 0.719 mi² water

01Location & Geography

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

Primary CityLiberty, MS
CountyAmite County (FIPS 28005)
StateMississippi (FIPS 28)
Metro Area (MSA)McComb, MS Micro Area (32620)
Census Region / DivisionSouth Region · East South Central Division
Coordinates31.148785, -90.79889
Land / Water Area320.981 mi² land · 0.719 mi² water

02Income & Economics

Distribution of the 1,840 individual tax returns filed in 39645 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
34.2%
$25K–$50K
25.5%
$50K–$75K
16.3%
$75K–$100K
8.2%
$100K–$200K
13.6%
$200K+
2.2%
The $200,000+ bracket accounts for 10% of 39645's total adjusted gross income, from 2% of returns — a concentration that drives the gap between the median ($40,426) 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 39645's IRS income metrics, 2020–2022.

Median income (2021→2022)
$40,426
▲ 11.9%
Filers earning $200K+
2.2%
▼ 0.0 pt
Total filers
1,840
▲ 1.7%
GET /zipc/v2/zipcodes/39645/soi?year=… $35K 2020 $36K 2021 $40K 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 39645 ZCTA.

2000
5,275
 
2010
5,016
▼ -4.9%
2020
4,869
▼ -2.9%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortC
USPS Finance Number274303
City AliasesLiberty

06Frequently Asked Questions

What county is ZIP code 39645 in?

ZIP code 39645 is in Amite County, Mississippi (county FIPS code 28005).

What city is ZIP code 39645?

The primary USPS city for 39645 is Liberty, MS.

What metro area (MSA) is 39645 in?

39645 is part of the McComb, MS Micro Area (MSA code 32620).

What is the population of ZIP code 39645?

The 2020 Census population of 39645 was 4,869 residents.

What is the median income in ZIP code 39645?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 39645 is about $40,426, 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.