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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 Wednesday and on Friday from 10:00 am to 2:00 pm. It is closed on Thursday and Saturday and Sunday.