Town Hall Address 12 Gulfstream Ave. Winfield, NJ 07036-6698 United States- Union County Website https://www.winfield-nj.org/ County Clerk 908-925-3850 12 Gulfstream Ave. Winfield, NJ 07036-6698 United States Assessor 908-925-3850 12 Gulfstream Ave. Winfield, NJ 07036-6698 United States Tax Collector 908-925-3850 12 Gulfstream Ave. Winfield, NJ 07036-6698 United States Attorney 908-925-3850 12 Gulfstream Ave. Winfield, NJ 07036-6698 United States Mayor 908-925-3850 12 Gulfstream Ave. Winfield, NJ 07036-6698 United States Municipal Court 908-925-3937 12 Gulfstream Ave. Winfield, NJ 07036-6698 United States Town Hall Hours Monday - Friday 8:30AM to 4:00PM County Union