Antonio Fontán Pérez (15 October 1923 – 14 January 2010) was a Spanish journalist recognized for his work in promoting press freedom in his country. He was also a well-known Roman Catholic member of Opus Dei. In 1977, Fontán was elected to the Spanish Senate as a member of the Unión de Centro Democrático, in the first democratic general elections after the end of Francoist Spain. During his career, Fontán co-authored Spain's Constitution of 1978, which recognized freedom of expression and freedom of information as fundamental rights. He also served as a minister from 1979 to 1982.