Cill Chiaráin is Irish for "Ciarán's church" and is named after Saint Ciarán, who spent many years living in the village. There is a National School, a Church and a Holy Well named after him. Also, up on the hill overlooking the whole of Cill Chiaráin there is a cross erected in his honour and in front of that there is a place called "Leaba Chiaráin" ("Ciarán's bed").
Cill Chiaráin holds place for many tourists and every year it plays host to the Connemara Triathlon.
There is also a Cill Chiaráin in County Kilkenny.