Mount Arlignton Borough Hall is located at 419 Howard Boulevard, Mount Arlington, New Jersey 07856. Borough Hall Office Hours: Monday through Friday: Open: 8:30 a.m. to 1:00 p.m. Closed: 1:00 p.m. to 2:00 p.m. Open: 2:00 p.m. to 4:30 p.m.Read More