Antonio Leoncillo (or Leoncello or Leoncilli) (died c. 1653) was a Roman Catholic prelate who served as Bishop of Termoli (1651âÂÂ1653?).
Antonio Leoncillo was born in Spoleto, Italy. On 3 July 1651, he was appointed during the papacy of Pope Innocent X as Bishop of Termoli.
On 9 July 1651, he was consecrated bishop by Marcantonio Franciotti, Cardinal-Priest of Santa Maria della Pace.
He served as Bishop of Termoli until his death in 1653.