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US ZIP Code Profile

ZIP Code 36421
Andalusia, Alabama

ZIP code 36421 is in Andalusia, located in Covington County, Alabama. Its 2020 Census population was 9,166. The estimated median adjusted gross income per tax return is $43,683, and about 5% of filers report $200,000 or more.

2020 Population
9,166
Census ZCTA
County
Covington
FIPS 01039
Median income (est.)
$43,683
IRS SOI 2022
Land Area
206.87 mi²
+ 4.876 mi² water

01Location & Geography

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

Primary CityAndalusia, AL
CountyCovington County (FIPS 01039)
StateAlabama (FIPS 01)
Census Region / DivisionSouth Region · East South Central Division
Coordinates31.32473, -86.50693
Land / Water Area206.87 mi² land · 4.876 mi² water

02Income & Economics

Distribution of the 3,850 individual tax returns filed in 36421 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
31.9%
$25K–$50K
24.2%
$50K–$75K
14.0%
$75K–$100K
9.9%
$100K–$200K
15.1%
$200K+
4.9%
The $200,000+ bracket accounts for 30% of 36421's total adjusted gross income, from 5% of returns — a concentration that drives the gap between the median ($43,683) 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 36421's IRS income metrics, 2020–2022.

Median income (2021→2022)
$43,683
▲ 5.5%
Filers earning $200K+
4.9%
▲ 0.3 pt
Total filers
3,850
▼ 0.3%
GET /zipc/v2/zipcodes/36421/soi?year=… $39K 2020 $41K 2021 $44K 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 36421 ZCTA.

2010
9,241
 
2020
9,166
▼ -0.8%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number010270
City AliasesAndalusia

06Frequently Asked Questions

What county is ZIP code 36421 in?

ZIP code 36421 is in Covington County, Alabama (county FIPS code 01039).

What city is ZIP code 36421?

The primary USPS city for 36421 is Andalusia, AL.

What is the population of ZIP code 36421?

The 2020 Census population of 36421 was 9,166 residents.

What is the median income in ZIP code 36421?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 36421 is about $43,683, 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.