The Old Post Office, also known as U.S. Post Office, is a historic post office building located at 121 Ellicott Street in Buffalo in Erie County, New York. It was the tallest building in the city from 1901 to 1912. It was designed by the Office of the Supervising Architect during the tenure of Jeremiah O'Rourke when construction started in 1897. The $1,500,000 building opened in 1901 during the tenure of James Knox Taylor and operated as Buffalo's central post office until 1963. The highly ornamented Gothic Revival style four story building features a 244-foot tower over the central entrance. The main feature of the interior is a roofed courtyard. It was subsequently occupied by federal offices. Since 1981, it has been home to the city campus of Erie Community College.