| Official Name: | Castlelyons |
| Native Name: | Irish: Caisleán Ó Liatháin |
| Native Name Lang: | ga |
| Settlement Type: | Village |
| Pushpin Map: | Ireland |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Ireland |
| Subdivision Type: | Country |
| Subdivision Name: | Ireland |
| Subdivision Type1: | Province |
| Subdivision Name1: | Munster |
| Subdivision Type2: | County |
| Subdivision Name2: | County Cork |
| Unit Pref: | Metric |
| Population As Of: | 2016 |
| Population Footnotes: | [1] |
| Population: | 374 |
| Utc Offset1: | +0 |
| Timezone1 Dst: | IST (WEST) |
| Utc Offset1 Dst: | -1 |
| Coordinates: | 52.089°N -8.234°W |
| Blank Name: | Irish Grid Reference |
Castlelyons [2] is a small village in the east of County Cork, Ireland. It is also a civil parish in the barony of Barrymore.[3] The name is derived from a stronghold of the Uí Liatháin - an early medieval kingdom. It is situated 6km (04miles) south of Fermoy. In the 2016 census it recorded a population of 374. Castlelyons is part of the Dáil constituency of Cork East.
There are two stone bridges that cross the River Bride into the village - one a small footbridge and the other a bridge which was part of the entrance into Barrymore Castle - the seat of the Earls of Barrymore. The parish has two churches at Bridesbridge and Coolagown, and also has a castle, two abbeys, a mausoleum, two holy wells, and many other historical sites.
The Catholic parish of Castlelyons today is made up of three main districts - Coolagown, Britway and Castlelyons/Bridesbridge. Three quarters of the parish extend along the banks of the River Bride.
Castlelyons Friary existed between the 14th and 18th centuries.
During the English Civil War, the Battle of Castlelyons in 1645 was fought near the village.
Hunting, shooting and fishing are popular in the area and there is both a gun club and an angling club.[4] The also village has a pitch and putt course.
The village has squash courts and a Gaelic Athletic Association (GAA) pitch. Castlelyons GAA is the local GAA club.