Ranking of St Tammany, LA Cities and Places By population in 2020
Updated on June 27, 2025.
Based on the US Census Vintage data estimates, in 2020, among all St Tammany, LA cities and places, Balance of St. Tammany Parish had the highest population (204.80K), followed by Slidell city (28.63K), and Mandeville city (12.83K).
The chart below shows the top 9 cities and places, and the table below shows the ranking of all St Tammany cities and places.
You can see similar information for other Louisiana counties. You can also see the ranking of all cities and places in Louisiana.
Data Source: US Census Bureau (Vintage).
Ranking of St Tammany, LA Cities and Places By population in 2020
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| Rank | City or Place | Population |
|---|---|---|
| 1 | Balance of St. Tammany Parish | 204799 |
| 2 | Slidell city | 28629 |
| 3 | Mandeville city | 12826 |
| 4 | Covington city | 11569 |
| 5 | Abita Springs town | 2628 |
| 6 | Pearl River town | 2540 |
| 7 | Madisonville town | 847 |
| 8 | Folsom village | 775 |
| 9 | Sun village | 394 |