Kilronan Castle, previously known as Castle Tenison, is a large country house standing in 40 acres (16 ha) of parkland on the shore of Lough Meelagh in County Roscommon, Republic of Ireland, 2 kilometres (1.2 mi) from the village of Ballyfarnon.
Towards the end of the 18th century the property later known as Castle Tenison, together with its surrounding estate, belonged to the Dundas family.
He died in 1726 and left the property to his son, William, who in 1746 was Lieutenant Colonel of the 35th Regiment of Foot and also an MP for Dunleer.
It was the 8th Earl of Kingston who built the present house in the 1880s as a large Gothic Revival extension to the older building.
The Land Commission ultimately acquired the property and later sold the castle to Michael and Brendan Layden.