The patron of Ionadi is Saint Nicholas of Bari, celebrated on 15 August, a few days after the feast of the Madonna del Rosario on 12 August.
Members of the local confraternity, recognizable by their traditional robe or medallion, are required to take part in the Corpus Domini and Good Friday processions. The town also holds the Church of Santa Maria Maggiore and the Church of the Santissimo Rosario.