Teesside Teesside Teesside () is the conurbation in the north east of England around the urban centre of Middlesbrough that is primarily made up of the towns Billingham, Redcar, Stockton-on-Tees, Thornaby and surrounding settlements near the River Tees. It was the name of a local government district between 1968 and 1974—the County Borough of Teesside. Teesside remains an important centre for heavy industry, although the number of people employed has declined. Traditional industries, primarily steelmaking (British Steel) and chemical manufacture (Imperial Chemical Industries (ICI)), have been replaced to a large extent by high technology activities, science development and service sector roles.
Teesside Cleveland, Yorkshire and Durham are frequently used, such as the continued existence of Cleveland Police and Cleveland Fire and Rescue Service, and of the Cleveland postal county. The Teesside Built-up Area (BUA), previously the Teesside Urban Area, identified by the ONS for statistical purposes had a population of around 376,633 according to the 2011 census which is up 3% on the 2001 figure of 365,323, and had the following subdivisions: Eaglescliffe and Yarm are counted as a separate Yarm urban area, separated by a narrow gap, which had a population of 19,184 according to the 2011 census up 5% from