| Giacomo Plezza | |
| Office: | Minister of the Interior of the Kingdom of Sardinia |
| Term Start: | 27 July 1848 |
| Term End: | 10 August 1848 |
| Predecessor: | Lorenzo Pareto |
| Successor: | Pier Dionigi Pinelli |
| Office2: | Senator of the Kingdom of Sardinia and the Kingdom of Italy. |
| Term Start2: | 22 May 1848 |
| Term End2: | 4 September 1893 |
| Legislature: | dalla I (nomina 3 April 1848) to XVIII |
| Birth Date: | 26 December 1806 |
| Birth Place: | Cergnago |
| Death Place: | Arona |
Giacomo Plezza (1806 - 1893) was an Italian politician.
Appointed senator in 1848 by King Charles Albert, he was vice-president of the divisional council of Novara, president of the provincial council of Lomellina, mayor of Cergnago, and envoy extraordinary and minister plenipotentiary in the Kingdom of the Two Sicilies (December26, 1848May16, 1849).[1]
He was the architect of important irrigation works in Lomellina; a canal irrigating vast areas in the provinces of Novara and Pavia bears his name.[2]