José Mariano Rebelo Pires Gago (16 May 1948 – 17 April 2015) was a Portuguese electrical engineer and politician for the Socialist Party. He served as the Minister for Science and Technology from 28 October 1995 to 6 April 2002. He also served as the Ministry of Science, Technology and Higher Education from 21 March 2005 to 21 June 2011.