Kilkenny West (Irish: Cill Chainnigh Thiar), previously Maherquirke or Dillons country, is a barony in west County Westmeath, Ireland. It was formed by 1542. It is bordered by County Longford to the west; it is also bordered by three other Westmeath baronies: Rathconrath (to the east), Brawny (to the south-west) and Clonlonan (to the south-east). The largest centre of population in the barony is the village of Glassan.