Turnmill Street is a street in London. It runs north-south from Clerkenwell Road in the north, to Cowcross Street in the south. One of the oldest streets in London, it has been variously known as Turnmill and Turnbull Street over its history. During the Elizabethan era, under the name Turnbull Street it became "the most disreputable street in London", notorious as a centre of crime and prostitution.