Slidell, Louisiana

Slidell population, 2020 to 2024

Slidell lost 189 residents from July 2020 to July 2024, a change of -0.7%. In the latest year it moved by -30. Among 59 Louisiana places of 5,000 or more, that growth ranks 20th; the median place changed by -2.7%. The median place of 5,000+ in Louisiana has 11,686 people, so Slidell is 2.4 times that size.

Slidell covers 15.21 square miles of land and 0.38 of water, for 1,870 people per square mile of land. The median Louisiana place of 5,000+ has 1,568, so Slidell is denser than the typical town.

What county Slidell is in

All of Slidell's residents live in St. Tammany Parish, which had 277,615 residents in 2024. Slidell holds 10.2% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Slidell

2 ZIP Code Tabulation Areas (ZCTAs) overlap Slidell by at least 10% of the ZCTA's or the city's land: 70458, 70460. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Slidell is

The Census internal point of Slidell is at 30.288900, -89.782900. Baton Rouge, the capital, is 84.5 miles W in a straight line. The nearest larger place is New Orleans, LA (362,701 people), 18.6 miles away.

Daylight in Slidell

At 30.29° N, Slidell gets about 14 h 06 min of daylight around the June solstice and 10 h 12 min around the December solstice, a swing of 3 h 55 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Slidell

The eight nearest incorporated places of 1,000+ in Louisiana, measured between internal points. The closest is Pearl River, 6.0 miles away, with 2,647 people.