Giovanni Battista Trotti (1555 – 11 June 1612) was an Italian painter of the late-Renaissance period, active mainly in Piacenza, Parma, and his native city of Cremona.

In Cremona, he was initially a pupil of Bernardino Campi, whose niece he married.

Other pictures by him are: a Immaculate Conception for San Francesco Grande, in Piacenza, and a Descent from the Cross, now found in the Brera Academy.

He painted frescoes in the cupola of Sant'Abbondi, after designs by Campi, and in the Palazzo del Giordani, in Parma.

Pupils of Trotti include Stefano Lambri, Francesco Superti,[1] Giulio Calvi, and Cristoforo Augusta.