Ballyroan (Irish: Baile Átha an Róine) is a small village in County Laois, Ireland.

A castle likely stood there in the Middle Ages, as one Conall Ó Mórdha, son of Daibhí Ó Mórdha, lord of Laois, is attested to have "built the castle of Baile atha in roine" in the fourteenth century.

[3] The area remained in the hands of the O'Mores until the sixteenth century; it is listed in the possessions of Conall Ó Mórdha (d. 1537).

In 1834, Alexander Harrison rented a house, offices, and yard on Main Street in Ballyroan.

Brendan O Donoghue writes of Alexander Harrison's work in what is now County Laois.

[4] They would become the only corps in Laois to support Eoin MacNeill over John Redmond during the debate as to whether the Irish Volunteers should participate in the First World War.

Three sisters (nuns) from the Abbeyleix Community took up residence in their newly built convent on 25 September of that year.