Antonio Giacomo Caimi (16 April 1811, Sondrio – 5 January 1878, Milan) was an Italian portrait painter, author, and professor at the Brera Academy.
He trained initially at the Accademia Carrara in Bergamo under Giuseppe Diotti, then moved to the Brera Academy, where he studied with Luigi Sabatelli.
His painting of Columbus, explaining his plans to reach India, was purchased by Charles Albert of Sardinia.
His best known book was Delle arti del designo e degli artisti nelle provincie di Lombardia dal 1777 al 1862 (The Arts of Design, and the Lombardian Artists from 1777 to 1862), published on the occasion of the International Exhibition in London.
In 1873, he published two works on the history and contents of local museums: Cenno storico sul museo patrio di archeologia in Milano (The Civic Archaeological Museum) and La pinacoteca della Regia Accademia di Belle Arti in Milano (The gallery at the Brera Academy).