Marciano della Chiana is a comune (municipality) in the Province of Arezzo in the Italian region Tuscany, located about southeast of Florence and about southwest of Arezzo.
Marciano della Chiana borders the following municipalities: Arezzo, Castiglion Fiorentino, Foiano della Chiana, Lucignano, Monte San Savino.
The town is of medieval origins, dating to the Lombard domination in Tuscany; later it was acquired by the commune of Arezzo and then by the Republic of Siena. In 1554 it was the seat of the Battle of Marciano (or Scannagallo).