Pellegrino Tomaso Ronchi (19 January 1930 – 24 October 2018) was an Italian bishop, emeritus of the Diocese of Città di Castello.

He was ordained a priest on 21 March 1953. He first was 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 problem, on 9 November 1985. Later he was appointed bishop of Diocese of Città di Castello on 7 February 1991. Ronchi retired as bishop on 16 June 2007.^[1]

• Profile of Mons. Ronchi www.catholic-hierarchy.org
• Profile of Mons. Ronchi www.gcatholic.org