Listowel ("Tuathal's ringfort") is a heritage market town in County Kerry, Ireland. It is on the River Feale, 28 km (17 mi) from the county town, Tralee. The town of Listowel had a population of 4,820 according to the CSO Census 2016.

Described by the organisers of Listowel's writers festival as the "Literary Capital of Ireland", a number of internationally known playwrights and authors have lived there, including Bryan MacMahon and John B. Keane.

Listowel's history dates back to at least 1303 when it first appears in the Plea Roll. Fortress to the Fitzmaurice family, the town developed around Listowel Castle and its square. The last bastion against Queen Elizabeth I in the Desmond campaign, Listowel Castle was built in the 15th century and was the last fortress of the Geraldines to be subdued. It fell after 28 days siege to Sir Charles Wilmot on 5 November 1600, who had the castle's garrison executed in the following days. The castle became the property of the Hare family, the holders of the title of Earl of Listowel, after reverting away from the Fitzmaurices, Knights of Kerry. It is now a national monument, and was subject to restoration by the Office of Public Works (OPW) from 2005. OPW tour guides are now based at the castle during the summer tourist season giving free tours of the castle.

Another smaller castle at Woodford, Listowel, was built in the post-1600 period by the then Knight of Kerry.