Giovanni Battista Nasalli Rocca di Corneliano (27 August 1872 – 13 March 1952) was an Italian Cardinal of the Catholic Church.

The young priest collaborated with Bishop Giacomo Radini-Tedeschi in organising Catholic Action in Rome and the rest of Italy, and, in 1899, he entered the service of the Roman Curia, upon his nomination as an apprendista in the Sacred Congregation of Extraordinary Ecclesiastical Affairs with its secretary, Felice Cavagnis.

From 1904 to 1906, he served as Apostolic Visitor for the Sacred Visit of Rome, the dioceses of Ancona, Penne ed Atri, Recanati e Loreto, Teramo e Fermo, Bojano e Campobasso, and for many Italian seminaries.

He received his episcopal consecration on the following 10 February from Cardinal Vincenzo Vannutelli, with Archbishop Paolo Barone and Bishop Raffaele Virili serving as co-consecrators, in the Liberian Basilica.

After becoming an ecclesiastical assistant to the Italian Catholic Youth in June 1921, Nasalli Rocca was appointed Archbishop of Bologna on 21 November 1921.