| Order: | 154th Doge of the Republic of Genoa |
| Term Start1: | February 7, 1738 |
| Term End1: | February 7, 1740 |
| Predecessor1: | Nicolò Cattaneo Della Volta |
| Successor1: | Nicolò Spinola |
| Birth Date: | September 12, 1676 |
| Birth Place: | Genoa, Republic of Genoa |
| Death Date: | 1741 |
| Death Place: | Genoa, Republic of Genoa |
Costantino Balbi (Genoa, 12 September 1676 - Genoa, 1741) was the 154th Doge of the Republic of Genoa and king of Corsica.
On February 7, 1738, he was elected by the Grand Council as the new doge of the Republic: the one hundred and eighth in biennial succession and the one hundred and fifty-fourth in republican history. As doge he was also invested with the related biennial office of king of Corsica. Ceased the dogal office on February 7, 1740 and retired to private life, he died in Genoa in 1741.[1] [2]