Idrone East (Irish: Uí Dhróna Thoir) is a barony in County Carlow, Ireland.

Idrone takes its name from the ancient name for the tuath, first recorded c. 1100 as Hua Drona in the Latin Vitae sanctorum Hiberniae.

[1] The Martyrology of Oengus the Culdee (c. 1150) calls it Huib Dróna in Middle Irish.

The ruling family claimed descent from Drona, fourth son of Cathair Mór, a legendary 2nd century AD king.

Forth barony is bordered to the south by St. Mullin's Lower; to the east by Forth; to the west by Idrone West; to the north by Carlow (all the preceding baronies are also in County Carlow); to the southwest by Gowran, County Kilkenny; and to the southeast by Scarawalsh and Bantry, County Wexford.