Town Hall Address 655 Main Street Islip, NY 11751 United States- Suffolk County Website https://www.townofislip-ny.gov/ County Clerk Judith A. Pascale 631-852-2001 Monday - Friday 9:00 A.M. to 5:00 P.M. 310 Center Drive Riverhead, NY 11901 United States Town Clerk 631-224-5490 townclerk@townofislip-ny.gov 8:30 a.m. until 4:30 p.m. 655 Main Street Islip, NY 11751 United States Tax Collector 631-224-5580 8:30 am to 4:30 pm Monday through Friday 40 Nassau Ave Islip, NY 11751 United States Assessor 631-224-5585 assessorsoffice@islipny.gov Monday to Friday 8:30 am to 4:00 pm 40 Nassau Ave Islip, NY 11751 United States Code Enforcement 631-224-5466 commissioner-pd@islipny.gov 1 Manitton Court Islip, NY 11751 United States Fire District 631-581-5656 28 Monell Ave Islip, NY 11751 United States County Suffolk