Benjamin Boothby (5 February 1803 – 21 June 1868) was a South Australian colonial judge, who was removed from office for misbehaviour, one of four Australian supreme court judges removed in the 19th century. Boothby was born in Doncaster, Yorkshire. He assisted Sir Thomas Wilde in his electoral campaigns and read in his chambers. He was called to the Bar at Gray's Inn in 1825. In 1853, Boothby was appointed a Judge of the Supreme Court of South Australia. This was the last appointment of a South Australian judge by the Colonial Office.