United States Postal Service 160 1st St, Mineola, NY11501 Built in 1935 the Mineola post office is situated on the northeast corner of Main and 1st streets. It offers 24-hour…More access to the lobby and an automated post office machine as well as a FedEx drop box in front of the building. The branch also sports a large bank of P.O. boxes and a kiosk of packing supplies. Two service windows are located in the main lobby; one is dedicated for businesses.