| Type: | Bishop |
| Honorific-Prefix: | Most Reverend |
| Giovanni Battista Bagalà Blasini | |
| Bishop of Grosseto | |
| Church: | Catholic Church |
| Diocese: | Diocese of Grosseto |
| Term: | 1876–1884 |
| Predecessor: | Anselmo Fauli |
| Successor: | Bernardino Caldaioli |
| Consecration: | 31 May 1868 |
| Consecrated By: | Niccola Paracciani Clarelli |
| Birth Date: | 6 April 1803 |
| Birth Place: | Livorno, Grand Duchy of Tuscany |
| Death Date: | 2 March 1884 |
| Death Place: | Livorno, Italy |
Giovanni Battista Bagalà Blasini (6 April 1803 - 2 March 1884) was a Roman Catholic prelate who served as Bishop of Grosseto (1876–1884).
Giovanni Battista Bagalà Blasini was born in Livorno. He served as auxiliary bishop of Livorno (1868–1876), for which office he had been appointed titular bishop of Cydonia (Crete). He was transferred to the diocese of Grosseto by Pope Pius IX on 3 April 1876. He died on 1 March 1884.[1]