Castleisland - pronounced "Castle island" or locally "Cass lieland!" - (Oilean Ciarrai in Gaelic) is a busy market town and commerical center in County Kerry in southwest Ireland. The town is renowned for the width of its main street - the second widest in Ireland and second only to the famous O'Connell Street in Dublin. Castleisland has a population of about 2,000.
Castleisland is often considered the Gateway to Kerry, as the main road to all towns in Western and Southern Kerry passes through here - the N21 from Limerick continues on to Tralee while the N22 goes to Killarney and other towns in Southern Kerry.
The Glenaruddery mountains to the north and the Stacks to the west define the beginning of the 'Vale of Tralee', at the mouth of which Castleisland is situated. Most of the land around Castleisland is pasture for dairy stock, with bogland located at various locations around the town, particularly to the east and south.