🇺🇸 United States ZIP Code

STANDARD

36528

Dauphin Island

ZIP Code 36528 is a standard zip code serving Dauphin Island, Dauphin Island, Alabama (AL), in Mobile County, United States. It has an estimated population of 1,237 with a median household income of $63,542. 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: Dauphin Island
Timezone: America/Chicago

Coordinates

Latitude: 30.252100
Longitude: -88.109600

Geographic Details

Land Area: 6.37 mi²
Water Area: 27.47 mi²
Population Density: 194.0 people per mi² (60th percentile)
Bounding Box: 30.312421°N, 30.190491°S, -88.045979°E, -88.332417°W

With 1,237 residents spread across 6.37 square miles, this area has a population density of 194.0 people per square mile.

Demographics

1,237

Population

30th percentile

$63,542

Median Income

75th percentile

$234,000

Median Home Value

80th percentile

6.37 mi²

Land Area

The median household income in 36528 is $63,542, and the median home value is $234,000. This places the area in the top 25% nationally for household income.

Housing

1,817

Total Units

581

Occupied Units

32.0%

Occupancy Rate

Similar ZIP Codes in Alabama

ZIP codes with similar median household income in Alabama.

36576

Silverhill

$59,236

36106

Montgomery

$58,185

35806

Huntsville

$69,644

35019

Baileyton

$54,342

35117

Mount Olive

$72,500

35907

Gadsden

$70,147

35575

Lynn

$55,074

35490

Vance

$54,284

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.