William Wickham (1831 – May 16, 1897), MP, FLS, was a Member of Parliament for Petersfield, a High Sheriff of Hampshire, Chairman of the Petty sessional division, and served on the Board of guardians, being Guardian of West Worldham.
He was bom in London in 1831, the eldest son of Henry Lewis Wickham (1789–1864), of Binsted Wyck, Receiver General of Gibraltar. His mother was Lucy, youngest daughter of William Markham, of Becca Hall, Yorkshire. He was sixth in descent from Bishop William Wickham, Bishop of Winchester and Bishop of Lincoln. He was educated at Westminster School and New Inn Hall. He received a B.A. degree in 1854, and an M.A. degree in 1857 from Balliol College, Oxford.
He was called to the Bar at the Inner Temple in 1857, and in 1888–89 was High Sheriff of Hampshire. In 1892, he entered Parliament in the Conservative interest as the representative for Petersfield, succeeding Viscount Wolmer; in 1895 he was returned unopposed. He sat the Alton Bench, and for nearly 20 years acted as Chairman of the Petty sessional division. He was a member of the Board of Guardians, first as an ex officio member, and later as Guardian for West Worldham. He served as the County Councillor for the Selborne division. Wickham was a director of the Sun Fire and Life Assurance Company. He was the editor of the Correspondence (1870) of the Rt. Hon. William Wickham, his grandfather and a spymaster.