| Giovanni Giacomo Semenza | |
| Birth Date: | July 18, 1580 |
| Birth Place: | Bologna |
| Death Date: | 1638 |
| Nationality: | Italian |
| Known For: | Painting |
| Movement: | Baroque |
Giovanni Giacomo Semenza (18 July 1580 - 1638) was an Italian painter of the early Baroque period. Born in Bologna and also known as Giacomo Sementi. He was a pupil of the painter Denis Calvaert, then of Guido Reni. Among his pupils were Giacinto Brandi. He painted a Christ the Redeemer for the church of St. Catherine in Bologna.