Sir Stephen James McAdden (3 November 1907 – 26 December 1979) was a British Conservative politician.
McAdden was educated at the Salesian School, Battersea and worked as an export sales manager and company director. He was a councillor on Hackney Borough Council 1935-45, Woodford Borough Council 1945-48 and Essex County Council 1947-48.
McAdden was Member of Parliament for Southend East from 1950 until he died in office in 1979. His successor at the resulting by-election was Teddy Taylor.