About Duncanville, ALDuncanville is located in Alabama. Duncanville, Alabama has a population of 4,287. Duncanville is less family-centric than the surrounding county with 27% households with children. The county percentage for households with children is 27%. The median household income in Duncanville, Alabama is $50,717. The median household income for the surrounding county is $50,223 compared to the national median of $57,525. The median age of people living in Duncanville is 40.3 years. Duncanville WeatherThe average high temperature in July is 91.4 degrees, with an average low temperature in January of 33.46 degrees. The annual precipitation is 52.76. Duncanville MapDuncanville real estate officesReal estate near DuncanvilleNearby CitiesNearby Cities Homes for Sale |