Gaddo Gaddi (* 1260 in Florence; 1332 ebenda) was a Florentine painter of the Gothic style. He was called to Rome by Clement V in 1308, where he completed a series of large mosaic works in the style of the Cimabue, of which pieces are still preserved in Santa Maria Maggiore. He was also assigned a coronation of the Virgin Mary in the inner lunette of the main portal of the Cathedral of Florence. In 1312 he became a member of the Florence painters' guild and died there in 1332.
His son Taddeo Gaddi and his grandson Agnolo Gaddi also became famous painters.