Stefano di Giovanni di Consolo, known as il Sassetta (1392 – 1450 or 1451) was an Italian painter.
He was born in Siena, although there is also an hypothesis that he was born in Cortona. The first historical record of him was anyway in Siena in 1423. Sassetta was the apprentice of Paolo di Giovanni Fei or Benedetto di Bindo. He painted in the semi-archaic Sienese School style of painting. Francesco di Giorgio e di Lorenzo, better known as Vecchietta, is said to have been his apprentice.
He died by pneumonia contracted while decorating the Assumption fresco in the Porta Romana of Siena. The work was finished by his pupil Sano di Pietro.