Killeenduff (Irish: An Cillín Dubh, meaning 'small black church')^[1] is a townland within the boundaries of the civil parish of Easky, County Sligo in Ireland. Located about a mile from the village of Easky, Killeenduff has an area of approximately 4 square kilometres (1.5 sq mi).^[2]

The townland is home to the "Split Rock". Local folklore holds that this rock —though actually carried to its current location by an Ice Age glacier— was split as a result of an argument between two giants. According to legend, if one walks through the split three times, it will close, entombing the person forever.^[3]

Killeenduff National School, built in 1965 and extended and refurbished in 2007, is located in the area.^[4]

Notable people

• Jack Harte, writer, was born at Forge's Corner in Killeenduff, where his father was a blacksmith. Several of his short stories draw upon Killeenduff and its local mythology.^{[citation needed]}
• Fred Conlon, sculptor, was born and grew up in Killeenduff.^[5]