Terryglass (Irish: Tír Dhá Ghlas, meaning 'land of the two streams') is a village in County Tipperary, Ireland. It is on the north-eastern shore of Lough Derg, near where the River Shannon enters the lough, on the R493 road. Terryglass is also a civil parish in the historical barony of Ormond Lower, and an ecclesiastical parish in the Roman Catholic Diocese of Killaloe.
Derryhiveny Castle is a tower house and National Monument located in County Galway, Ireland.