Corlough (Irish: Corlach) is a Roman Catholic parish situated in the historical barony of Tullyhaw, County Cavan, Ireland. It derives its name from Corlough townland, in which the parish church is situate. It formed part of the larger parish of Templeport until 1877 when Corlough was made a separate parish.

The name of Corlough parish has an unclear derivation. Some references propose it means either 'the hill of the lake' or "the lake of the herons". These are unlikely meanings as there is no lake in the townland. The earliest reference to the townland is in the 1790 list of Cavan townlands where it is spelled "Corclagh", which would be an Anglicization of "Cor Cloch", meaning either 'the stone on the round hill' or "the stony hill".

Corlough townland, within Corlough parish, is recorded in the Placenames Database of Ireland as Corlach, meaning "hilly place".

Bus Éireann Thursdays only route 464 (Carrigallen-Ballinamore-Enniskillen) serves Corlough Cross.

Townlands in Corlough parish include: Aghnacollia; Altachullion Lower; Altachullion Upper; Altateskin; Altcrock; Altinure; Altnadarragh; Arderry; Ardvagh; Cartronnagilta; Clarbally; Corlough townland; Cornacleigh; Corracholia Beg; Corracholia More; Corrachomera; Corraclassy; Corranierna (Corlough); Corratillan; Cronery; Culliagh; Curraghabweehan; Derry Beg; Derryconnessy; Derry More; Derrynacreeve; Derrynaslieve; Derryvahan; Derryvella (Corlough); Drumbeagh; Drumlaydan; Eaglehill; Garvary (Corlough); Gortnacargy; Gowlan; Greaghnadoony; Gubnagree; Knockmore, County Cavan; Lannanerriagh; Leitra, Corlough; Moneynure; Muineal; Owencam; Prospect, Corlough; Scrabby, Corlough; Tawnagh; Teeboy; Tirnawannagh; Tonlegee; Torrewa; Tullandreen; Tullybrack; Tullyloughfin; Tullynaconspod; Tullynamoltra; Tullytrasna; Tullyveela; Tullywaum;

54°07′28″N 7°46′09″W / 54.1245°N 7.7691°W / 54.1245; -7.7691