About Mandeville, LAMandeville is located in Louisiana. Mandeville, Louisiana has a population of 13,536. Mandeville is less family-centric than the surrounding county with 25% households with children. The county percentage for households with children is 31%. The median household income in Mandeville, Louisiana is $74,932. The median household income for the surrounding county is $68,197 compared to the national median of $61,963. The median age of people living in Mandeville is 41.9 years. Mandeville WeatherThe average high temperature in July is 91.9 degrees, with an average low temperature in January of 40.2 degrees. The annual precipitation is 65.6. Mandeville MapMandeville real estate officesReal estate near MandevilleNearby CitiesNearby Cities Homes for Sale |