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Post Offices




There are three post offices in the East Islip School District:

East Islip Post Office
11 Greenwood Ave., East Islip, NY 11730
631-581-7807

Great River Post Office
62 River Road, Great River, NY 11739
631-581-7680

Islip Terrace Post Office
136 Carleton Ave., Islip Terrace, NY 11752
631-581-7894





Friday, April 28, 2017