Pellegrino Tomaso Ronchi (19 January 1930 â 24 October 2018) was an Italian bishop, emeritus of the Diocese of Cittàdi Castello.
He was ordained a priest on 21 March 1953. He was first appointed bishop of the Diocese of Porto-Santa Rufina on 7 December 1984, receiving his episcopal consecration on 6 January 1985 from Pope John Paul II. He then resigned from this position, due to illness problems, on 9 November 1985. Later, he was appointed bishop of Diocese of CittÃÂ di Castello on 7 February 1991. Ronchi retired as bishop on 16 June 2007.