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Post Offices in East Islip

Click on the Post Office from this list of 1 Post Offices in East Islip to view the opening hours, phone number, drop-off times, services and other information.

1. USPS Post Office East Islip (NY)

11 Greenwood Ave

East Islip, NY 11730

The Post Office is open Monday to Friday from 9:30 am to 2:30 pm and on Saturday from 10:00 am to 1:00 pm. It is closed on Sunday.