MANDEVILLE

Two buildings from early jazz history still stand in Mandeville. Ruby's Roadhouse has been in continuous operation since the 1920s and today is still popular a bar and live music venue. The Dew Drop Inn Dance Hall opened in January of 1895, it closed with the onset of the Great Depression and the building used only for storage for decades, preserving it unchanged from the early 20th century until it reopened in 2000 with live jazz as a protected historic landmark. (This was one of the earliest "Dew Drop"s; dance halls across the South were similarly named, including the club in New Orleans where Little Richard got his start. )

In 1956 a causeway across Lake Pontchatrain opened to automobile traffic, and a second span was added in 1969. This began the growth of Mandeville and the surrounding area as a suburban commuter community for people working in New Orleans. This trend increased in the 1980s and 1990s, bringing much growth to Mandeville.

According to the United States Census Bureau, the city has a total area of 17.6 km² (6.8 mi²). 17.6 km² (6.8 mi²) of it is land and none of it is covered by water.

There are 4,204 households out of which 35.6% have children under the age of 18 living with them, 50.6% are married couples living together, 10.8% have a female householder with no husband present, and 35.2% are non-families. 29.8% of all households are made up of individuals and 11.4% have someone living alone who is 65 years of age or older. The average household size is 2.46 and the average family size is 3.11.

In the city the population is spread out with 27.3% under the age of 18, 7.3% from 18 to 24, 28.9% from 25 to 44, 24.5% from 45 to 64, and 11.9% who are 65 years of age or older. The median age is 38 years. For every 100 females there are 89.2 males. For every 100 females age 18 and over, there are 84.7 males.

The median income for a household in the city is $52,500, and the median income for a family is $70,043. Males have a median income of $50,891 versus $30,554 for females. The per capita income for the city is $26,420. 7.6% of the population and 4.9% of families are below the poverty line. Out of the total people living in poverty, 7.1% are under the age of 18 and 13.7% are 65 or older.