| Type: | Bishop |
| Honorific-Prefix: | Most Reverend |
| Tommaso Tomassoni | |
| Bishop of Umbriatico | |
| Church: | Catholic Church |
| Diocese: | Diocese of Umbriatico |
| Term: | 1652–1654 |
| Predecessor: | Domenico Blanditi |
| Successor: | Giuseppe de Rossi |
| Consecration: | 21 January 1652 |
| Consecrated By: | Marcantonio Franciotti |
| Birth Date: | 1616 |
| Birth Place: | Rome, Italy |
| Death Date: | October 1654 (age 38) |
| Death Place: | Umbriatico, Italy |
Tommaso Tomassoni, O.P. (1616 – October 1654) was a Roman Catholic prelate who served as Bishop of Umbriatico (1652–1654).[1]
Tommaso Tomassoni was born in Rome, Italy in 1616 and ordained a priest in the Order of Preachers.[2] On 8 January 1652, he was appointed during the papacy of Pope Innocent X as Bishop of Umbriatico.On 21 January 1652, he was consecrated bishop by Marcantonio Franciotti, Cardinal-Priest of Santa Maria della Pace, with Ranuccio Scotti Douglas, Bishop Emeritus of Borgo San Donnino, and Patrizio Donati, Bishop Emeritus of Minori, serving as co-consecrators. He served as Bishop of Umbriatico until his death in October 1654.While bishop, he was the principal co-consecrator of Francesco Gozzadini, Bishop of Cefalonia e Zante (1654).