What Time does the Post Office Open?

As a rule the post office opens at 8 a.m. Monday through Friday and 9 a.m. on Saturdays. Closing time is usually 5:30 p.m. weekdays and 12 noon on Saturdays. They are closed on Sundays. Many post offices today have automated systems in the lobbies that dispense stamps, weigh packages and have mail slots available for deposits which are open 24 hours a day, seven days a week.