| Business | Phone |
| American Red Cross 50 Commonwealth Dr, Wyandanch 11798 | (631) 789-1777 |
| Lond Island Caddie Scholarship 15 Homestead Dr, Wyandanch 11798 | (631) 253-9770 |
| Fan 66 N 19th St, Wyandanch 11798 | (631) 491-4166 |
| Quick Social Svc Inc 50 Commonwealth Dr, Wyandanch 11798 | (631) 643-5009 |
| Wyandanch Community Dev Corp 59 Cumberbach St, Wyandanch 11798 | (631) 643-4786 |
| Wyandanch Senior Nutrition Center 28 Wyandanch Ave, Wyandanch 11798 | (631) 491-4889 |