The Census of Elphin records Margaret O'Conor as residing in Clonalis in 1749.
The present Clonalis House was built in the late 1870s replacing an earlier Georgian house, the ruins of which can be seen at Clonalis.
In 1814 Clonalis is recorded as the residence of John Balfe.
In 1857, Charles Owen O'Conor, the O'Conor Don, lived here when the existing house was valued at £35 (Griffith's Valuation).
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