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US ZIP Code Profile

ZIP Code 36528
Dauphin Island, Alabama

ZIP code 36528 is in Dauphin Island, located in Mobile County, Alabama, within the Mobile metro area. Its 2020 Census population was 1,778. The estimated median adjusted gross income per tax return is $64,423, and about 9% of filers report $200,000 or more.

2020 Population
1,778
Census ZCTA
County
Mobile
FIPS 01097
Median income (est.)
$64,423
IRS SOI 2022
Land Area
6.281 mi²
+ 27.563 mi² water

01Location & Geography

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

Primary CityDauphin Island, AL
CountyMobile County (FIPS 01097)
StateAlabama (FIPS 01)
Metro Area (MSA)Mobile, AL Metro Area (33660)
Census Region / DivisionSouth Region · East South Central Division
Coordinates30.240423, -88.23832
Land / Water Area6.281 mi² land · 27.563 mi² water

02Income & Economics

Distribution of the 890 individual tax returns filed in 36528 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
24.7%
$25K–$50K
16.9%
$50K–$75K
14.6%
$75K–$100K
13.5%
$100K–$200K
21.3%
$200K+
9.0%
The $200,000+ bracket accounts for 36% of 36528's total adjusted gross income, from 9% of returns — a concentration that drives the gap between the median ($64,423) 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 36528's IRS income metrics, 2020–2022.

Median income (2021→2022)
$64,423
▼ 1.8%
Filers earning $200K+
9.0%
▼ 1.9 pt
Total filers
890
▲ 7.2%
GET /zipc/v2/zipcodes/36528/soi?year=… $57K 2020 $66K 2021 $64K 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 36528 ZCTA.

2000
1,369
 
2010
1,237
▼ -9.6%
2020
1,778
▲ +43.7%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortC
USPS Finance Number012320
City AliasesDauphin Island, Dauphin Isl

06Frequently Asked Questions

What county is ZIP code 36528 in?

ZIP code 36528 is in Mobile County, Alabama (county FIPS code 01097).

What city is ZIP code 36528?

The primary USPS city for 36528 is Dauphin Island, AL.

What metro area (MSA) is 36528 in?

36528 is part of the Mobile, AL Metro Area (MSA code 33660).

What is the population of ZIP code 36528?

The 2020 Census population of 36528 was 1,778 residents.

What is the median income in ZIP code 36528?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 36528 is about $64,423, with around 9% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.