William James Magarey (1840 – 15 December 1920) was a flour miller and politician in the early days of the colony of South Australia.
James Magarey ran Gannawarra Station on Gunbower Creek (a tributary of the River Murray), later owned a flour mill in Hindmarsh, South Australia, then moved to "Laurel Bank Villa", Geelong, Victoria and drowned following the wreck of SS Admella.
[2] He was on the boards of the Savings Bank, National Mutual Life Association, and the South Australian Woollen Company.
He was also chairman for some years of the Executor and Trustee Agency Company and British Broken Hill Proprietary.
On 10 March 1864 he married Anna Eliza Bundey (c. 1846 – 10 August 1920), a sister of Sir Henry Bundey; they had a daughter Edith May (died before 1920), and a son William Ashley Magarey (1868–1929), South Australian lawyer, originator of the Magarey Medal.