Sir William Stevenson KCB (1805 – 9 February 1863) was a Jamaican-born British colonial administrator who served as the 9th Governor of Mauritius from 20 September 1857 to 9 January 1863.
Stevenson's grandmother (née Lawrence) was descended from Henry Lawrence, President of Cromwell's Council of State, whose son founded a plantation in Jamaica in the 17th century.
He first served as superintendent of British Honduras from 1854–1857 before being appointed Governor of Mauritius in May 1857.
[4][5] He married a Miss Allwood, and had a son, William Lawrence Stevenson, and a daughter, who married Colonel Sir Francis Marindin.
His second wife was Caroline Octavia Biscoe, and their son was Francis Seymour Stevenson, M.P.