Jefferson Parish Government - Parish history, elected officials, job openings, planning and zoning. Jefferson Parish - Sheriff - Contact information, crime and gang statistics, bicycle registration form, and law enforcement links for Jefferson Parish. Jefferson Parish Human Services Authority (JPHSA) - Provides administrative and support services for those individuals and families affected by mental illness, developmental disabilities and substance abuse. Jefferson Parish Tax Collection Agencies - Rates and contact information for Jefferson Parish. Clerk of Court. Jefferson Parish. - Describes the primary functions and duties of the office of the Clerk of Court. General court information. Jefferson Parish Assessor - Answers questions regarding the homestead exemption and other Louisiana property tax laws.