Cornhill was a street that existed in Boston, Massachusetts, United States, between the 18th and 20th centuries. It was located on the site of the current City Hall Plaza in Government Center. It was named in 1829; previously it was known as Market Street (1807–1828). In its time, it comprised a busy part of the city near Brattle Street, Court Street and Scollay Square. In the 19th century, it was the home of many bookstores and publishing companies. As of 1969, Cornhill exists as 144 feet along the edge of City Hall Plaza.