Town Hall Address Civic Sq. Irvington, NJ 07111 United States- Essex County Website https://irvington.net/ County Clerk 973-399-6664 Civic Sq. Irvington, NJ 07111 United States County Admin 973-399-6621 Civic Sq. Irvington, NJ 07111 United States Assessor 973-399-6684 Civic Sq. Irvington, NJ 07111 United States Tax Collector 973-399-6613 Civic Sq. Irvington, NJ 07111 United States Attorney 973-399-6637 Civic Sq. Irvington, NJ 07111 United States Mayor 973-399-6630 Civic Sq. Irvington, NJ 07111 United States Municipal Court 973-399-6674 Civic Sq. Irvington, NJ 07111 United States Town Hall Hours Monday – Friday 9:00am – 4:30pm County Essex