Duncanville is a city located in Dallas County Texas. With a 2020 population of 37,817, it is the 90th largest city in Texas and the 1038th largest city in the United States . Duncanville is currently declining at a rate of -1.22% annually and its population has decreased by -1.84% since the most recent census, which recorded a population of 38,524 in 2010. Duncanville reached it's highest population of 39,839 in 2015. Spanning over 11 miles, Duncanville has a population density of 3,376 people per square mile.
The average household income in Duncanville is $70,301 with a poverty rate of 13.98%. The median rental costs in recent years comes to $1,140 per month, and the median house value is $149,600. The median age in Duncanville is 36.7 years, 35 years for males, and 39.4 years for females.