The patron saint of Foiano della Chiana is Saint Martin, celebrated on 11 November in the Collegiate Church of Santi Martino e Leonardo.
The Carnival of Foiano della Chiana, one of the most famous and oldest Italian carnivals, is held every year in two sessions: the first in the traditional winter period, the second in late spring-early summer, known as the summer carnival. The town also holds the Church of Santa Maria della Fraternita and the Church of the Santissima Trinità.