Sheffield urban area
The Sheffield Urban Area is a conurbation with a population of 685,368 according to the 2011 census. This was a 7% increase on the 2001 population of 640,720 making it the 8th largest conurbation in the United Kingdom and England's 6th largest. Named the Sheffield Urban Area by the Office for National Statistics, it must not be confused with the Sheffield City Region, a non-government term, although often used, particularly by the business community. The conurbation dominates South Yorkshire, with over half of the county's population living in this urban area. In 2001 the population density of the urban area was 3,949.2 people per km2  by 2011 this had increased slightly to 4,092 people per km2.
The city of Sheffield contributes just over two thirds of the population of the whole conurbation.
Places in the Conurbation
The conurbation's population is made up of the following settlements as defined by the Office for National Statistics:
|Area||District||Population (2001)||Population (2011)|
|Eckington||North East Derbyshire||n/a||7,386|
|Killamarsh||North East Derbyshire||n/a||9,251|
- Aughton is included under the Swallownest subdivision in the 2011 census.
- Beighton and Mosborough/Highlane is included under the Sheffield subdivision in the 2011 census.
- Chapeltown was no longer considered part of the Sheffield Urban Area according to the 2011 census.
- Killamarsh, Thorpe Hesley and Eckington were separate urban areas in the 2001 census.
- Catcliffe was included under the Rotherham subdivision in the 2001 census but were their own subdivisions for the 2011 census.
Settlements very close to the conurbation but not included in the official statistics include Warncliffe Side and Oughtibridge, which are separated from Hillsborough by Worrall and a half-mile stretch of the A6102 Middlewood Road North and the towns of Wath upon Dearne, Brampton Bierlow, Swinton, Mexborough, Darfield and Conisbrough which are part of the Dearne Valley Urban Area and are separated from Rawmarsh by the Wentworth Road, with the A633 and Dearne Valley railway lines.
Slightly further afield, Dronfield, in Derbyshire, is around half a mile away from the Greenhill area of the city along the A61 and B6158.
- "2011 Census - Built-up areas". ONS. Retrieved 1 July 2013.
- "Usual Resident population: Census 2001, Key statistics for urban areas (see line 516)". ONS.
- Pointer, Grahmam. "Acrobat (PDF) file giving statistics from UK Government" (PDF). ONS (www.statistics.gov.uk).
- "Urban North map (part 5)" (PDF). ONS.