Ballyboy () is a barony in County Offaly (formerly King's County), Ireland.
Ballyboy barony derives its name from the village of Ballyboy (Irish Baile ÃÂtha BuÃÂ, "settlement of the yellow ford").
Ballyboy barony is located in central County Offaly. The Silver River flows through it.
Below is a list of settlements in Ballyboy barony: