The Ballyfinboy River rises close to Moneygall in County Offaly, Ireland and flows in a generally northwesterly direction into Lough Derg at Drominagh. It forms part of the boundary between County Tipperary and County Offaly.  The river flows through the towns of Cloughjordan and Borrisokane west of which it flows past Ballyfinboy Castle, a ruined tower house with a Sheela na gig in the townland of Ballyfinboy.
An ornate stone bridge with cast iron railings carries the avenue leading to Modreeny across the Ballyfinboy.
Modern pedestrian bridges in Borrisokane Town Park link the two sections of the park, north and south of the river.
The three arched Drominagh Demesne Toll Bridge was built by the land owner in 1776 the now disused shelter for the toll collector is still visible.
- "Tipperary". Libraryireland.com. Retrieved 2013-05-22.
- "Ballinderry Bridge, Ballinderry, Tipperary North: Buildings of Ireland: National Inventory of Architectural Heritage". Buildingsofireland.ie. Retrieved 2013-05-22.
- "Tipperary North: Buildings of Ireland: National Inventory of Architectural Heritage". Buildingsofireland.ie. Retrieved 2013-05-22.
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