The London Borough of Sutton is a London borough in South London, England and forms part of Outer London. It covers an area of 43 km2 (16.6 sq mi) and is the 80th largest local authority in England by population. It is one of the southernmost boroughs of London.[2] It is south of the London Borough of Merton, west of the London Borough of Croydon and east of the Royal Borough of Kingston Upon Thames.

The borough includes the areas:

The hilly topography of Sutton and the lack of underground services in South London is a reason for the extensive suburban and inter-urban railway network. Sutton is in the commuter belt to London as part of suburbia. There are several busy local rail routes running along the borough's towns, connecting it with London Bridge, St. Pancras International and London Victoria. These local routes mainly run on the Sutton Loop and Sutton and Mole Valley Lines. As well as the main station of Sutton, there are several suburban stations at Hackbridge, West Sutton, Carshalton and Cheam and more.