Ibora was a city in the late Roman province of Helenopontus, which became a Christian bishopric. It is now called İverönü, Erbaa[1] in present-day Tokat Province, Turkey. This is stated also by the Annuario Pontificio, which lists the bishopric as a titular see.[2]
The article by Siméon Vailhé in the 1910 Catholic Encyclopedia placed its site at modern Turhal in the same modern province.[3]