St. Tammany Parish, Louisiana

St. Tammany Parish profile, demographic data, and geographic information.

Local Government & Public Administration

Authoritative general-purpose local government units serving this area U.S. Census Bureau GUS (2026) / GMAF

Government Unit	Unit Type	Jurisdiction Role	Contact / Address
PARISH OF ST TAMMANY GUS Population: 277,615 (2024) ID: 166017	County	Official County Government	Contact: PARISH PRESIDENT PO BOX 628, COVINGTON LA 70434-0628
CITY OF SLIDELL GUS Population: 28,440 (2024) ID: 105788	Municipal	Municipal Government Within County	Contact: CHIEF OF STAFF PO BOX 828, SLIDELL LA 70459
CITY OF MANDEVILLE GUS Population: 12,973 (2024) ID: 166127	Municipal	Municipal Government Within County	Contact: CITY CLERK 3101 E CAUSEWAY APPROACH, MANDEVILLE LA 70448-3592
CITY OF COVINGTON GUS Population: 11,686 (2024) ID: 166125	Municipal	Municipal Government Within County	Contact: DIRECTOR OF ADMINISTRATION PO BOX 778, COVINGTON LA 70434-0778
TOWN OF ABITA SPRINGS GUS Population: 2,752 (2024) ID: 105787	Municipal	Municipal Government Within County	Contact: TOWN CLERK PO BOX 461, ABITA SPRINGS LA 70420-0461
TOWN OF PEARL RIVER GUS Population: 2,647 (2024) ID: 190401	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 1270, PEARL RIVER LA 70452-1270
TOWN OF MADISONVILLE GUS Population: 875 (2024) ID: 166126	Municipal	Municipal Government Within County	Contact: TOWN CLERK PO BOX 160, MADISONVILLE LA 70447-0160
VILLAGE OF FOLSOM GUS Population: 829 (2024) ID: 166128	Municipal	Municipal Government Within County	Contact: MUNICIPAL CLERK 82378 JUNE ST, FOLSOM LA 70437-6204
VILLAGE OF SUN GUS Population: 399 (2024) ID: 193428	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 818, SUN LA 70463-0818