Nottingham is a city (and county town of Nottinghamshire) in the East Midlands of England. The centre of Nottingham lies on the River Leen and its southern boundary follows the course of the River Trent, which flows from Stoke to the River Humber estuary. According to the 2011 census, Nottingham has a city population of 305,700. Nottingham is a member of the English Core Cities Group. It has been nicknamed "Shottingham" due to the high rate of gun crime.