Mandeville is a city located in St. Tammany Parish Louisiana. With a 2020 population of 12,503, it is the 26th largest city in Louisiana and the 2632nd largest city in the United States . Mandeville is currently growing at a rate of 0.11% annually and its population has increased by 8.16% since the most recent census, which recorded a population of 11,560 in 2010. Mandeville reached it's highest population of 12,503 in 2021. Spanning over 7 miles, Mandeville has a population density of 1,756 people per square mile.
The average household income in Mandeville is $114,268 with a poverty rate of 10.33%. The median rental costs in recent years comes to $1,133 per month, and the median house value is $288,900. The median age in Mandeville is 43.7 years, 40 years for males, and 45.5 years for females.