O'Connor's GAC Glack (Irish: CLG Uí Chonchúir, An Glaic) is a Gaelic Athletic Association club based in the Glack/Ballykelly area in County Londonderry, Northern Ireland. The club is a member of Derry GAA and currently caters for Gaelic football and Camogie.

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O'Connor's GAC Glack

CLG Ó Conchobhair, An Glaic
Founded:	1921
County:	Derry
Colours:	Maroon and Blue
Grounds:	Brolly Park (Páirc Ó Bhrolaigh)
Coordinates:	55°01′23.87″N 7°01′50.31″W
Playing kits
Football Camogie

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Underage teams up to U-12's play in North Derry league and championships, from U-14 upwards teams compete in All-Derry competitions. Glack have won the Derry Intermediate Football Championship once and the Derry Junior Football Championship three times.

Glack fields Gaelic football teams at Under-8, Under-10, Under-12, Under-14, Under-16, Minor, Reserve and Senior levels. The Senior team competes in the Derry Junior Football Championship and Division 2 of the Derry ACFL.

The camogie club is called St Finlough’s Camogie Club Glack (Irish: Chlub an Camógaíocht Naomh Fionnloch Glaic) and fields teams at various age-groups. Notably, Glack is the home club of Junior All-Ireland crowned camogie player and captain Brigid Carmichael (née McLaughlin)

The club was founded in 1921^{[citation needed]}. One of the club's major honours came in 1971 when it won the Derry Minor Football Championship. They won the Derry Junior Football Championship a year later before winning the Derry Intermediate Football Championship in 1974. After dropping back down to Junior grade, Glack won the Derry Junior Championship for a second time in 1981. In 2019 the club won their third Derry Junior Championship defeating Drum to end a 39 year wait for a County Championship.

• Derry Intermediate Football Championship
• List of Gaelic games clubs in Derry

• O'Connor's GFC and St Finlough's CC website^{[permanent dead link]}
• Glack GAA – Home of O'Connors & St. Finloughs