Guglielmo Caccia called il Moncalvo (9 May 1568 – 1625) was an Italian painter of sacred subjects in a Mannerist style.
He started painting in Milan, then worked in Pavia, where he was made a citizen.
His best work, Deposition from the Cross, is at the church of San Gaudenzio, Novara.
He painted a St. Anthony Abbot with St Paul for the church of Sant'Antonio Abate in Milan.
Daniele Crespi and Giorgio Alberino were among his pupils, as was his daughter, Orsola.