Dauphin Island, AL Profile: Facts & Data


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Dauphin Island, Alabama - Basic Facts

The Town of Dauphin Island had a population of 1,368 as of July 1, 2020. Dauphin Island ranks in the lower quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Alabama. See peer rankings below.

The primary coordinate point for Dauphin Island is located at latitude 30.2555 and longitude -88.1097 in Mobile County. The formal boundaries for the Town of Dauphin Island encompass a land area of 6.26 sq. miles and a water area of 159.69 sq. miles. Mobile County is in the Central time zone (GMT -6). The elevation is 7 feet.

The Town of Dauphin Island (GNIS ID: 2406357) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Alabama is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The Town of Dauphin Island is located within Bayou La Batre Division of Mobile County.


Dauphin Island, AL Data & Demographics (As of July 1, 2020)


Total Population 1,368 (100%)
Population in Households 1,354 (99.0%)
Population in Families 1,035 (75.7%)
Population in Group Quarters1 14 ( 1.0%)
Population Density 219
Diversity Index2 9


Median Household Income $77,694
Average Household Income $96,038
% of Income for Mortgage4 14%
Per Capita Income $45,406
Wealth Index5 138


Total HU (Housing Units) 1,971 (100%)
Owner Occupied HU 503 (25.5%)
Renter Occupied HU 145 ( 7.4%)
Vacant Housing Units 1,323 (67.1%)
Median Home Value $256,316
Average Home Value $282,171
Housing Affordability Index3 191


Total Households 648
Average Household Size 2.09
Family Households 407
Average Family Size 3
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.


2010-2020 2020-2025
Population 0.98% 0.79%
Households 1.05% 0.79%
Families 0.85% 0.63%
Median Household Income   0.87%
Per Capita Income   1.43%
Owner Occupied HU   0.71%


Dauphin Island, AL - Peer Comparisons by Rank and Percentile

The table below compares Dauphin Island to the other 586 incorporated cities, towns and CDPs in Alabama by rank and percentile using July 1, 2020 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 269 54th
Population Density # 321 45th
Median Household Income # 29 95th
Housing Affordability Index # 132 23rd
Per Capita Income # 11 98th
Diversity Index # 566 4th

Additional comparisons and rankings can be made with a VERY EASY TO USE Alabama Census Data Comparison Tool.

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