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Post Offices in Holtsville

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

1. USPS Post Office Holtsville (NY)

162 Long Island Ave

Holtsville, NY 11742

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