A Message from the Supervisor

“Welcome to Islip, the 3rd largest town in New York State, but with an endearing small town feel. We are so proud of our town…our beaches, golf courses, marinas, parks, housing opportunities for all, businesses, industrial parks, healthcare and educational institutions including our own Islip MacArthur Airport that provides many job opportunities. I sincerely hope you find this website helpful.” - Angie

Planning Document Search

Economic Development Contact


William G. Mannix

40 Nassau Ave

Islip, NY 11751


(631) 224-5532

The Town of Islip Office of Economic Development assists companies in identifying sites for relocation or expansion, in fast tracking all necessary permits, and in accessing the many Federal, State and local economic programs available to help grow your business. 

   Visit the Economic Development web site.

Planning & Development Department Divisions
Planning Division: (631) 224-5450
Building Division: Permits: (631) 224-5466 Building Division: Records: (631) 224-5470
Engineering Division: (631) 224-5360
Zoning Board of Appeals: (631) 224-5489
Economic Development: (631) 224-5512