Saint Oliver Plunkett's GAC Greenlough (Irish: CLG Naomh Oilibheir Pluinceid Grainlocha) is a Gaelic Athletic Association club based in Clady/Greenlough, County Londonderry, Northern Ireland.

The club is a member of Derry GAA and currently caters for Gaelic football and camogie, and also competes in Scór.

Greenlough is known for some quite exquisite gaa players Daniel O'Neill who had to end his career early due to a serious problem.

St Oliver Plunkett's GAC Greenlough was founded in 1939 by Michael Henry, Patrick Rankin and Louis Madden.

Players such as Thomas Edward McCloskey, Jimmy Cassidy and the McErlean brothers (Eoin and Henry) played on the Derry Senior side of the time.