Don Girolamo Boncompagni (23 March 1622 – 24 January 1684) was a Roman Catholic cardinal.
He was born in Isola del Liri the son of Don Gregorio I Boncompagni, 2nd Duke of Sora, Aquino, Arce and Arpino, 3rd Marquess of Vignola, and wife Eleonora Zapata called Zappi and the great-grandson of Pope Gregory XIII.
There were several other Cardinals in his family; he was the Grand-nephew of Cardinal Filippo Boncompagni (1572), nephew of Cardinal Francesco Boncompagni (1621) and uncle of another Cardinal Girolamo Boncompagni, archbishop of Bologna (1695).
[1] On 4 February 1652, he was consecrated bishop by Niccolò Albergati-Ludovisi, Cardinal-Priest of Santa Maria degli Angeli e dei Martiri, with Ranuccio Scotti Douglas, Bishop Emeritus of Borgo San Donnino, and Carlo Carafa della Spina, Bishop of Aversa, serving as co-consecrators.
While bishop, he was the principal consecrator of:[2] and the principal co-consecrator of: This article about an Italian Catholic cardinal is a stub.