| Business | Phone |
| Ascension Lutheran Church 33 Bay Shore Rd, Deer Park 11729 | (631) 667-4188 |
| Church St Cyril & Methodius 97 Half Hollow Rd, Deer Park 11729 | (631) 243-1077 |
| Community Presbyterian Church 1843 Deer Park Ave, Deer Park 11729 | (631) 242-0221 |
| Crisis Pregnancy Hotline 1767 Deer Park Ave, Deer Park 11729 | (631) 722-4355 |
| First Baptist Church 191 Washington Ave, Deer Park 11729 | (631) 667-5313 |
| First Pentecostal Church 64 Tiber Ave, Deer Park 11729 | (631) 242-2011 |
| Jehovah's Witnesses 235 Commack Rd, Deer Park 11729 | (631) 586-8235 |
| Refuge Apostolic Church 85 Wilson Ave, Deer Park 11729 | (631) 242-8208 |
| S S Cyril & Methodius Church 97 Half Hollow Rd, Deer Park 11729 | (631) 586-8810 |
| St Cyril Catholic Church 105 Half Hollow Rd, Deer Park 11729 | (631) 667-4044 |
| St Patricks Episcopal Church 305 Carlls Path, Deer Park 11729 | (631) 586-9136 |
| Stony Brook Assembly 400 Nicolls Rd, Deer Park 11729 | (631) 689-1127 |