Dauphin Island is a city located in Mobile County Alabama. With a 2020 population of 1,411, it is the 225th largest city in Alabama and the 8950th largest city in the United States . Dauphin Island is currently growing at a rate of 2.77% annually and its population has increased by 13.97% since the most recent census, which recorded a population of 1,238 in 2010. Dauphin Island reached it's highest population of 1,411 in 2021. Spanning over 166 miles, Dauphin Island has a population density of 226 people per square mile.
The average household income in Dauphin Island is $101,028 with a poverty rate of 2.34%. The median rental costs in recent years comes to $1,111 per month, and the median house value is $257,600. The median age in Dauphin Island is 58.8 years, 60 years for males, and 58.3 years for females.