Stephen Owen Davies (c. 1886 – 25 February 1972) was a Welsh miner, trade union official and Labour Party politician, the Member of Parliament (MP) for Merthyr Tydfil, previously Merthyr for nearly 38 years, from 1934 to 1972. In 1970, well past 80, he was deselected as parliamentary candidate by his local party association because of his age. He fought the election in the 1970 general election as an independent candidate and won comfortably, a rare example in British politics of an independent candidate defeating a major party's organisation. In a BBC TV interview the day after that election, he claimed to be 83 years old.