Jefferson Parish, Louisiana

Jefferson 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 JEFFERSON GUS Population: 427,253 (2024) ID: 166004	County	Official County Government	Contact: PARISH PRESIDENT 200 DERBIGNY ST, STE 6100, GRETNA LA 70053-7802
CITY OF KENNER GUS Population: 64,650 (2024) ID: 193422	Municipal	Municipal Government Within County	Contact: CHIEF ADMINISTRATIVE OFFICER 1801 WILLIAMS BLVD, KENNER LA 70062-6296
CITY OF GRETNA GUS Population: 17,185 (2024) ID: 183804	Municipal	Municipal Government Within County	Contact: CITY CLERK PO BOX 404, GRETNA LA 70054-0404
CITY OF HARAHAN GUS Population: 8,819 (2024) ID: 127832	Municipal	Municipal Government Within County	Contact: MAYOR 6437 JEFFERSON HWY, HARAHAN LA 70123-5035
CITY OF WESTWEGO GUS Population: 8,231 (2024) ID: 166072	Municipal	Municipal Government Within County	Contact: MAYOR 419 AVENUE A, WESTWEGO LA 70094-3644
TOWN OF JEAN LA FITTE GUS Population: 1,815 (2024) ID: 127833	Municipal	Municipal Government Within County	Contact: SECRETARY 2654 JEAN LAFITTE BLVD, JEAN LAFITTE LA 70067-5204
TOWN OF GRAND ISLE GUS Population: 991 (2024) ID: 208193	Municipal	Municipal Government Within County	Contact: TOWN CLERK PO BOX 200, GRAND ISLE LA 70358-0200