Stephen David Wyatt Milligan (12 May 1948 – 7 February 1994) was a British Conservative politician and journalist.
He held a number of senior journalistic posts until his election to serve as Member of Parliament (MP) for Eastleigh in 1992.
Milligan was Parliamentary Private Secretary to Jonathan Aitken, Minister of State for Defence, and was regarded as a "rising star" of the Conservative Party.
Milligan was found dead in his house in Chiswick, London, in February 1994, apparently self-strangled during an act of autoerotic asphyxiation.