Oldbury is a market town in the Metropolitan Borough of Sandwell, West Midlands, England. It is the administrative centre of the borough. At the 2011 census, the town had a population of 13,606, while the 2017 population of the wider built-up area was estimated at 25,488. Sandwell Metropolitan Borough Council, which defines Oldbury Town as consisting of the wards of Bristnall, Langley, Oldbury, and Old Warley, gave the population as 50,641 in 2011.