Slidell is a city located in Louisiana. With a 2020 population of 27,661, it is the 13th largest city in Louisiana and the 1379th largest city in the United States. Slidell is currently declining at a rate of -0.09% annually but its population has increased by 2.19% since the most recent census, which recorded a population of 27,068 in 2010. Slidell reached it's highest population of 27,856 in 2016. Spanning over 16 miles, Slidell has a population density of 1,804 people per square mile.
The average household income in Slidell is $70,326 with a poverty rate of 14.57%. The median rental costs in recent years comes to $1,018 per month, and the median house value is $156,200. The median age in Slidell is 36.7 years, 34.2 years for males, and 38.9 years for females. For every 100 females there are 89.0 males.