US Post Office is located at 867 Hempstead Tpke, Franklin Square, NY. This business specializes in Post Offices. US Post Office is open Mon 9:00am-7:00pm, Tue&Wed 9:00am-5:00pm, Thur 9:00am-7:00pm, Fri 9:00am-5:00pm, Sat 9:00am-2:00pm and accepts Discover and Visa.