Crescentius of Rome (Italian: San Crescenzio di Roma) is venerated as a child martyr by the Roman Catholic Church.

[1] Led back to Rome, Crescentius, who was eleven years old, was beheaded on the via Salaria, outside of the city walls.

His body was translated from Rome to Siena around 1058 by Pope Stephen IX at the request of Bishop Antifredus.

The only biographical source concerning Crescentius was derived from the copy of a manuscript from 1600 and conserved in the Biblioteca Vallicelliana.

[2] The Acta is not reliable as it was written long after the alleged death of this saint, probably around 1058, when the body of Crescentius was translated to Siena.