Ballycowan or Ballycowen (Irish: Baile Mhic Comhainn) is a barony in County Offaly (formerly King's County), Ireland.

Ballycowan derives its name from Ballycowan Castle (near Tullamore) and the townland of Ballycowan (Irish Baile Mhic Comhainn, "settlement of Mac Comhainn").

[1] Ballycowan is located in north County Offaly, around the valleys of the Clodiagh River and Silver River.

Ballycowan was part of the territory of the Ó Maolmhuaidh (O'Molloy) sept of the Southern Uí Néill.

[2] Below is a list of settlements in Ballycowan: This article related to the geography of County Offaly, Ireland is a stub.