It returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom, elected by the first-past-the-post voting system.
1918–1950: The County Borough of Middlesbrough wards of Acklam, Ayresome, Cannon, Cleveland, Linthorpe, and Newport.
[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] * Thomson was issued with the Coalition Coupon but rejected it.
General Election 1939–40: A General election was due to take place before the end of 1940, but was postponed due to the Second World War.