Associazione Sportiva Gualdo Casacastalda is an Italian association football club, based in Gualdo Tadino, Umbria and also representing Casacastalda, a frazione of Valfabbrica, Umbria.
In the season 2011-12 A.S.D. Casacastalda, founded in 1984, was promoted for the first time, from Eccellenza Umbria to Serie D after playoffs.