1918–1950: The County Borough of Middlesbrough wards of Acklam, Ayresome, Cannon, Cleveland, Linthorpe, and Newport.
1950–1964: The County Borough of Middlesbrough wards of Acklam, Ayresome, and Linthorpe, and the Borough of Thornaby-on-Tees.[1]
1964–1974: The County Borough of Middlesbrough wards of Acklam, Ayresome, Crescent, Gresham, Linthorpe, Park, and Whinney Banks, and the Borough of Thornaby-on-Tees.[2]
A General election was due to take place before the end of 1940, but was postponed due to the Second World War. By 1939, the following candidates had been selected to contest this constituency;