Suggest an update Name* Categories* State* Locality* ZIP* Street address* Phone* Website* Company description* U S Government Post Office-Holtsville one duchshe diggings from the category Government Offices Federal New York in the state, located in the city by the address 162 Long Island Avenue Holtsville, NY (New York) 11742-1800. To clarify all the issues can be contacted by phone (631) 475-1761 . Location U S Government Post Office-Holtsville you can see on the interactive map. </br></br><b>Opening Hours</b></br></br>Monday 8:00 AM – 4:00 PM</br>Tuesday 8:00 AM – 4:00 PM</br>Wednesday 8:00 AM – 4:00 PM</br>Thursday 8:00 AM – 4:00 PM</br>Friday 8:00 AM – 4:00 PM</br>Saturday - 8:00 AM – 2:00 PM</br>Sunday - Closed Your comments* (not for publishing) * — Required information U S Government Post Office-Holtsville ← View details 162 Long Island Avenue Holtsville, NY (New York) 11742-1800, Holtsville, New York (631) 475-1761