Town Hall Address One Provost Sq. Caldwell, NJ 07006 United States- Essex County Website http://www.caldwell-nj.com County Clerk 973-403-4638 One Provost Sq. Caldwell, NJ 07006 United States County Admin 973-403-4634 One Provost Sq. Caldwell, NJ 07006 United States Assessor 973-226-6349 One Provost Sq. Caldwell, NJ 07006 United States Tax Collector 973-226-6347 One Provost Sq. Caldwell, NJ 07006 United States Attorney 973-239-2800 One Provost Sq. Caldwell, NJ 07006 United States Mayor 973-403-4636 One Provost Sq. Caldwell, NJ 07006 United States Municipal Court 973-403-4630 One Provost Sq. Caldwell, NJ 07006 United States County Essex