Ennis ("island") is the county town of County Clare, Ireland. The Irish name is short for Inis Cluana Ramhfhada ("island of the long rowing meadow"). The town is on the River Fergus, north of where it enters the Shannon Estuary, 19 km (12 mi) from Shannon Airport. In 2016, Ennis had a population of 25,276, making it the largest town in Clare and the 12th largest in Ireland.

Ennis is a stronghold of traditional music with many musicians in residence and regularly playing locally. The Ennis Book Club Festival, in association with Clare County Library, runs annually on the first weekend in March. It attracts readers and authors from all over Ireland and beyond. Glor Theatre is a concert and events venue in the town centre.

In 2016 and 2017 Ennis hosted the Fleadh Cheoil na hÉireann music competition. It is the first time that the town has hosted the event since 1977.