The barony lies in the lower reaches of the Suir valley. The river forms the border with neighbouring County Waterford for much of its journey through the barony, with the exception of a box around Carrick-on-Suir which straddles both banks. The Comeragh Mountains lie to the south while to the northeast is Slievenamon. The Lingaun River joins the Suir two miles downstream of Carrick-on-Suir. It holds good stocks of trout.