Giovanni Battista Venanzi (born 1628) was an Italian painter of the Baroque period.

Born in Pesaro, his first training was with Guido Reni in Bologna, then Simone Cantarini, then Benedetto Gennari. He painted a Descent of the Holy Ghost for the church of Saints Gervasius and Protasius in Bologna. He painted a Life of San Antonio for the church of San Antonio at Pesaro.

References

• Bryan, Michael (1889). Walter Armstrong; Robert Edmund Graves (eds.). Dictionary of Painters and Engravers, Biographical and Critical. Vol. II L-Z. London: George Bell and Sons. pp. 659–61.