| Name | Address, Zip |
| Committee To Honor The Victims Of The Irish Hunger 1845-51 Inc | 7 Cedar Rd E, 11951-5121 |
| Long Island Association Of Special Education Administrators Inc | Po Box 144, 11951-0144 |
| William Floyd Council Of Administrators And Supervisors | 338 Blanco Dr, 11951-1021 |
| People Advocating For Change Inc | Po Box 404, 11951-0404 |
| Align Me God Lcm | 228 Commack Rd, 11951-3417 |
| All Faith Soccer League Inc | 23 Riverside Ave, 11951-1101 |
| Long Term Care Alternatives Inc | 5 Hemlock Dr, 11951-7113 |
| National Ambucs Inc | 306 Jefferson Dr, 11951-2510 |
| Mastic Beach Ambulance Company Inc | Po Box 523, 11951-0523 |
| American Legion | Po Box 72, 11951-0072 |
| American Legion Auxiliary | Po Box 47, 11951-0047 |
| Colonial Youth And Family Services Inc | Po Box 391, 11951-0391 |
| St Andrews Church | 250 Neighborhood Rd, 11951-3623 |
| Animal Angel Animal Rescue | 119 Hemlock Dr, 11951-3708 |
| Anthony Daly Munchkin Foundation Inc | 302 Cypress Dr, 11951-1710 |
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| Ocean Arts Theatricals Inc | Po Box 204, 11951-0204 |
| Cultural Arts Guild Of Mastic Beach | 373 Neighborhood Road, 11951-3414 |
| Civil Service Employees Association | 75 Washington Ave, 11951-2312 |
| Minority Women In Business Support Association Inc | Po Box 1, 11951-0001 |
| Long Island Speech Association Inc | Po Box 133, 11951-0133 |
| Mastic Beach Property Owners Association Inc | 31 Neighborhood Rd, 11951-5025 |
| Lynvet Football & Cheerleading Association Inc | Po Box 128, 11951-0128 |
| Suffolk County Youth Cheerleading Association Inc | Po Box 128, 11951-0128 |
| Civil Service Employees Association | 240 Mastic Beach Rd, 11951-1028 |
| Civil Service Employees Association | 242 Orchid Dr, 11951-1815 |
| Civil Service Employees Association | Po Box 295, 11951-0295 |
| Pattersquash Creek Civic Association Inc | 464 Riviera Dr, 11951-6419 |
| Bayview Baptist Church Inc | 72 Neighborhood Rd, 11951-5014 |
| South Shore Youth Baseball Club | 201 Church Dr, 11951-1208 |
| William Floyd Boys Basketball Booster Club Inc | 15 President Rd, 11951-2709 |
| Bay Manor Nursery School | Po Box 144, 11951-0144 |
| Mastic Beach Mini Indie Film Fest Inc | 124 Cedar Rd E, 11951-5619 |
| Mastic Beach Conservancy Corp | 5 Hemlock Dr, 11951-7113 |
| Mastic Beach Yacht Club Inc | 97 Riviera Dr, 11951-6013 |
| Mastic Beach Fire Department Incorporated | Po Box 486, 11951-0486 |
| Bethany Hermitage Inc | 3 Dana Ct, 11951-1111 |
| Rushing Wind Biker Church | 161 Laurelton Dr, 11951-5913 |
| Black Forest Solution Inc | 279 Beaver Dr, 11951-2215 |
| Body Of Christ Full Gospel Church | 120 Mastic Rd, 11951-2411 |
| Parent Booster Usa Inc | 336 Blanco Dr, 11951-1021 |
| Parent Booster Usa Inc | 336 Blanco Dr, 11951-1098 |
| Grandma Cares Inc | 235 Cypress Dr, 11951-2213 |
| Central Council Of The Society Of St Vincent De Paul In The Diocese | 89 Overlook Dr, 11951-3613 |
| L I Chihuahua Rescue Inc | 106 Dahlia Dr, 11951-2911 |
| Grace Lutheran Church | 240 Mastic Rd, 11951-1600 |
| Smith Point Fish & Hunt Club Inc | Po Box 609, 11951-0609 |
| Columbiettes Incorporated | 6 Estate Dr, 11951-1300 |
| Knights Of Columbus | 89 Overlook Dr, 11951-3613 |
| Shirley-mastics Community Service Project Inc | Po Box 81, 11951-0081 |
| Marine Corps League | 25 Blue Point Rd, 11951-6807 |
| William Floyd District Pto | 240 Mastic Beach Rd, 11951-1028 |
| William Floyd Special Education Pto | 240 Mastic Beach Rd, 11951-1028 |
| Enlightened Word Inc | 280 Monroe Dr, 11951-2711 |
| Paradise Fellowship Inc | 184 Elder Dr, 11951-4625 |
| William Floyd High School Ptso | 240 Mastic Beach Rd, 11951-1028 |
| Strong Island Youth Football Inc | 20 Market St, 11951-1201 |
| Hope For Our Neighbors Inc | 322 Neighborhood Road, 11951-3412 |
| Gerontology Professionals Of Long Island Inc | 5 Hemlock Dr, 11951-7113 |
| William Paca Ms Pto | 338 Blanco Dr, 11951-1021 |
| Silent Prayer | 165 Cranberry Dr, 11951-4612 |
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