🇺🇸 United States ZIP Code

STANDARD

36421

Andalusia

ZIP Code 36421 is a standard zip code serving Andalusia, Andalusia, Alabama (AL), in Mobile County, United States. It has an estimated population of 9,241 with a median household income of $40,030. The area falls within the America/Chicago timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Alabama (AL)
County: Mobile
City: Andalusia
Timezone: America/Chicago

Coordinates

Latitude: 31.324700
Longitude: -86.506700

Geographic Details

Land Area: 206.91 mi²
Water Area: 4.89 mi²
Population Density: 45.0 people per mi² (35th percentile)
Bounding Box: 31.458823°N, 31.181133°S, -86.286937°E, -86.772812°W

With 9,241 residents spread across 206.91 square miles, this area has a population density of 45.0 people per square mile.

Demographics

9,241

Population

65th percentile

$40,030

Median Income

25th percentile

$112,200

Median Home Value

40th percentile

206.91 mi²

Land Area

The median household income in 36421 is $40,030, and the median home value is $112,200. This is below the national average for household income.

Housing

4,708

Total Units

3,778

Occupied Units

80.2%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Andalusia, AL.

36420

Andalusia

Similar ZIP Codes in Alabama

ZIP codes with similar median household income in Alabama.

35674

Tuscumbia

$37,586

35671

Tanner

$41,038

35980

Horton

$36,144

35136

Rockford

$36,645

35033

Bremen

$45,137

36854

Valley

$36,465

36265

Jacksonville

$39,753

36266

Lineville

$34,207

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.