Ida (Irish: Uí Dheá[3][4]) is a barony in the south-east of County Kilkenny, Ireland.

[3][6] The barony is 249.8 square kilometres (96.4 sq mi) in size, with highest point at Tory Hill.

[14][13] "Ui-Bearrchon of the yellow mantle - King of that terriroty is O'Caelluidhe, Plain of a tribe, who return heavily, The land over the bright-flowing Barrow."

[17] Ida is 249.8 square kilometres (96.4 sq mi) in size and lies at the south-east of the county.

Ida contains the town of Slieveroe and the population centres of Glenmore, The Rower and Tullagher.

[18] Ida contains the civil parishes of Ballygurrim, Clonamery, Dunkitt, Dysartmoon, Gaulskill, Jerpointwest, Kilbride, Kilcoan, Kilcolumb, Kilmakevoge, Listerlin, Rathpatrick, Rosbercon, Rossinan, The Rower, and Shanbogh.

[20] It also contains Moondice bog, Tory Hill, The Pink Point, and Garraunbaun Rock.