Tinnahinch may refer to several things in Ireland:
Graiguenamanagh, a town on the Carlow-Kilkenny border, the Carlow side of which is referred to as Tinnahinch Tinnahinch Castle, 17th-century tower in the Carlow Tinnahinch Tinnahinch (barony), a barony in County Laois Tinnahinch GAA, a defunct Gaelic Athletic Association (GAA) club based in Clonaslee, County Laois