Greagh (from Irish: Gréach meaning 'a Moor or flat bog') is a townland in the civil parish of Templeport, County Cavan, Ireland. It lies in the Roman Catholic parish of Templeport and barony of Tullyhaw.
Greagh is bounded on the north by Ballymagirril townland, on the west by Sraloaghan and Leckan townlands in County Leitrim, on the south by Lislahy and Knocks townlands in County Leitrim and on the east by Cornagunleog townland. Its chief geographical features are a wood and spring wells.
Greagh is traversed by minor roads and rural lanes.
The townland covers 142 statute acres.
Until the 19th century Greagh formed part of the modern townland of Ballymagirril, so its history is the same until then.
Griffith's Valuation of 1857 lists six landholders in the townland.
In the 1901 census of Ireland, there are four families listed in the townland, and in the 1911 census of Ireland, there are only three families listed in the townland.
There don't seem to be any structures of historical interest in the townland.
Coordinates: 54°04′31″N 7°48′37″W / 54.07514°N 7.810271°W