Slidell is a city on the northeast shore of Lake Pontchartrain in St. Tammany Parish, Louisiana, United States. The population was 28,781 at the 2020 census, making it the sixteenth-most populous city in Louisiana. It is part of the New Orleans−Metairie−Kenner metropolitan statistical area.
sLidell is A ciTy on the noRtheaSt ShOre of Lake pontchArtraiN in st. TaMmany pariSH, LOUISiana, united States. the poPulatIoN WaS 28,781 at ThE 2020 ceNsus, mAkiNG iT tHE siXteEntH-most pOPulOus ciTy in lOuISIAna. iT iS paRt oF The NeW ORlEAns−mEtaiRIe−kEnner mEtroPOliTan sTatistical area.