| James Leonard | |
| Honorific-Suffix: | QC |
| Office: | Attorney-General of the Cape Colony |
| Term Start: | Jul 1882 |
| Term End: | May 1884 |
| Predecessor: | Thomas Scanlen |
| Successor: | Thomas Upington |
| Primeminister1: | Gordon Sprigg |
| Term Start1: | Jan 1881 |
| Term End1: | May 1881 |
| Predecessor1: | Thomas Upington |
| Successor1: | Thomas Scanlen |
| Office2: | Parliament of Cape Colony |
| Term Start2: | 1879 |
| Term End2: | 1988 |
| Birthname: | James Weston Leonard |
| Birth Date: | 20 April 1853 |
| Birth Place: | Somerset East, Cape Colony |
| Death Place: | Brussels, Belgium |
| Profession: | Barrister-at-law |
| Nationality: | South African |
James Weston Leonard (20 April 1853 – 3 September 1909) was an influential politician of South Africa and Attorney-General of the Cape Colony.[1]
Leonard was born in Somerset East and received his schooling at Gill College. He studied law at the University of Cape Town, graduating with an LL.B. in 1876.[2]
In the same year that he obtained his degree, he became a member of the Cape Bar and practised at the Cape until 1888.[3]
He served as Member of the Cape Legislative Assembly for Oudtshoorn (1880–88) and served as Attorney General in the governments of Cape Prime Ministers, Gordon Sprigg in 1881 and Thomas Scanlen from 1882 until 1884. In 1883, at the age of thirty, he received the status of QC.
After the discovery of gold he settled in Johannesburg and from 1888 he practised at the Johannesburg Bar and was implicated in the Jameson Raid of 1895–6. In 1899 he moved to London.