- AquaQuest
 - Locust Valley - Specialises in underwater travel, adventure, and diving books. - Barrons Educational Series, Inc.
- Hauppauge - Publisher of business, pet, children's, college guide, foreign language, cooking, art, and test preparation books.
- Baywood Publishing Company
- Amityville - Publishes scholarly and professional books and journals.
- Buccaneer Books
- Cutchogue - Offers limited edition, library bound fiction and nonfiction reprints.
- Chanting Monks Studios
- Valley Stream - Publisher of horror and thriller comics and fiction magazines.
- Haworth Press, Inc.
- Bridgehampton
- Mondo Publishing
- Greenvale - Featuring a children's bookshop literacy programme, and teacher development and support.
- Moran Publishing Co Inc
- East Islip - Legal research company publishes The New York Jury Verdict Reporter, VerdictSearch, its companion research service, and other legal publications.
- Permanent Press, The
- East Hampton - Publishers of primarily fiction, with literary awards including an American Book Award and a National Book Award finalist.
- Scholium International Inc.
- Port Washington - Publisher, distributor, and bookseller to libraries, research professionals, and individuals worldwide.
- Starwater Press
- Amityville - Home of the Hopeful Healer, and publishing books about nursing, alternative medicine and spirituality.
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