SS London was a British steamship that sank in the Bay of Biscay on 11 January 1866. The ship was travelling from Gravesend in England to Melbourne, Australia, when she began taking in water on 10 January, with 239 persons aboard. The ship was overloaded with cargo, and thus unseaworthy, and only 19 survivors were able to escape the foundering ship by lifeboat, leaving a death toll of 220.