Associazione Sportiva Gualdo Casacastalda is an Italian association football club, based in Gualdo Tadino, Umbria and also representing Casacastalda, a frazione of Valfabbrica, Umbria.

The two companies are a few km away, and the proponent of the idea was Matteo Minelli, Gualdese entrepreneur and honorary president of the Casacastalda.

The initiative, carried out by the two companies with the support of the respective municipalities, leads to the birth of the new Associazione Sportiva GualdoCasacastalda officially presented on 11 July 2013.

The new company uses the old sports title of Casacastalda, and enrolled in the Serie D. The club was founded in 1920 as Società Sportiva Gualdo and made several appearances in professional football, reaching the Serie C1 promotion playoffs twice, in 1995 and 1998.

In the season 2011–12 the team was promoted for the first time, from Eccellenza Umbria to Serie D after playoffs.