James Seymour Leslie (1 March 1958 – 22 February 2009) was a Unionist politician in Northern Ireland. Born in Singida, Tanganyika Territory, and educated at Eton College, Leslie read law and land economy at Queens' College, Cambridge, before becoming a merchant banker. In 1996 he was an unsuccessful candidate in the Northern Ireland Forum election in North Antrim. Despite having no experience in politics, he was elected as an Ulster Unionist Party (UUP) member of the Northern Ireland Assembly for North Antrim in 1998.