St. Tammany Parish, Louisiana Cities (2025)

12 cities

City
Rank
2025 Pop.
2020 Pop.
Change
Density
Area (mi²)
Type
Slidell128,38728,694-0.21%1,85915.27 City
Mandeville213,10512,8400.41%1,4009.36 City
Covington311,66411,5490.2%1,4548.02 City
Eden Isle48,9758,1031.46%2,9553.04 CDP
Lacombe56,6247,294-2.03%25026.45 CDP
Abita Springs62,7982,6301.23%6104.59 Town
Pearl River72,7042,5631.05%7243.73 Town
Madisonville88868480.91%3512.53 Town
Folsom98387751.58%4211.99 Village
Lewisburg105523556.98%1,0970.50 CDP
Sun114063950.5%954.27 Village
Rio123343087.05%2951.13 CDP

St. Tammany Parish Cities Summary

Largest City

Slidell is the largest city in St. Tammany Parish, with a population of 28,387.

Smallest City

Rio is the smallest city in St. Tammany Parish.

10 Largest Cities

There are 12 cities in St. Tammany Parish, Louisiana.

Location of St. Tammany Parish