Andrew Michael Sullivan (born 10 August 1963) is an English-born American author, editor, and blogger. Sullivan is a conservative political commentator, a former editor of The New Republic, and the author or editor of six books. He was a pioneer of the political blog, starting his in 2000. He eventually moved his blog to various publishing platforms, including Time, The Atlantic, The Daily Beast, and finally an independent subscription-based format.

Sullivan was born in South Godstone, Surrey, into a Roman Catholic family of Irish descent, and was brought up in the nearby town of East Grinstead, West Sussex. He was educated at Reigate Grammar School and Magdalen College, Oxford, where he was awarded a first-class Bachelor of Arts in modern history and modern languages. In his second year, he was elected President of the Oxford Union for Trinity term 1983.  Sullivan earned a Master of Public Administration in 1986 from the John F. Kennedy School of Government at Harvard University, followed by a Doctor of Philosophy degree in government from Harvard in 1990. His dissertation was titled Intimations Pursued: The Voice of Practice in the Conversation of Michael Oakeshott.  In 2001, it came to light that Sullivan had posted anonymous online advertisements for unprotected anal sex, preferably with "other HIV-positive men". He was widely criticised in the media for this, with some critics noting that he had condemned President Bill Clinton's "incautious behavior", though others wrote in his defense. In 2003, Sullivan wrote a Salon article identifying himself as a member of the gay "bear community". On 27 August 2007, he married Aaron Tone in Provincetown, Massachusetts.  Sullivan was barred for many years from applying for United States citizenship because of his HIV-positive status. Following the statutory and administrative repeals of the HIV immigration ban in 2008 and 2009, respectively, he announced his intention to begin the process of becoming a permanent resident and citizen. On The Chris Matthews Show on 16 April 2011, Sullivan confirmed that he had become a permanent resident, showing his green card. On 1 December 2016, Sullivan became a naturalized U.S. citizen.  He has been a daily user of marijuana since 2001.

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