Giuseppe Maria Longhi (13 October 1766, Monza - 2 January 1831, Milan) was an Italian painter and engraver, in the Neo-Classical style.
He was born to Carlo Francesco Longhi, a silk merchant and antiques dealer, and his wife Cecilia née Caronni.
His teachers included Antonio Mussi (1751-1810), the future Rector of the Biblioteca Ambrosiana, who noticed and encouraged his drawing skills.
Three years later, he was called on to participate in the Consulte de Lyon; in return for an engraving of Napoleon he had made in 1797, from a painting by Antoine-Jean Gros, done at the artist's request.
The largest collections of his prints are held by the Musei Civici di Monza [it] and the Civica raccolta delle stampe Achille Bertarelli [it].