Vittorio Amedeo Ranuzzi de' Bianchi (14 July 1857 – 16 February 1927) was an Italian Cardinal of the Roman Catholic Church.

[1] Ranuzzi was ordained to the priesthood on 14 May 1880, and then did pastoral work in the archdiocese of Bologna and taught at its seminary, where he also served as spiritual director from 1894 to 1899.

He was later made an honorary canon (1885) and primicerius (1892) of the cathedral chapter, counselor of the nunciature to France on 13 September 1899, and a Domestic Prelate of His Holiness in 1899.

He received his episcopal consecration on the following 12 July from Cardinal Pietro Respighi, with Archbishops Giuseppe Constantini and Rafael Merry del Val serving as co-consecrators, at the chapel of the Nobili Oblate in Tor de' Specchi in Rome.

Pope Benedict XV created him Cardinal Priest of Santa Prisca in the consistory of 4 December 1916.