Go to the site linked to below and you will find information on all the GAA clubs in Cork, both city and county.
Adding together Hurling and Gaelic Football titles won in all grades, Cork would be the most successful county in the GAA. As to which county is the best, that is a question that could be debated by many people.
Ballinahinch GAA Club in county Tipperary was founded in 1886.
Sarsfields GAA - Cork - was created in 1896.
A number of clubs claim this title. Some that were founded in the early days of the GAA are now gone, like Metropolitans in Dublin. Others survive, like Blarney GAA club(Cork), founded in 1884, the same year as the GAA itself. Others founded in 1884 include Round Towers(Dublin), Tullaroan(Kilkenny), and South Liberties (Limerick).
It is a GAA club in the suburbs of the city of Cork. They have teams for Hurling, Gaelic Football, Camogie and Ladies Gaelic Football.
Brownstown GAA club is on the N52 in county Westmeath. It is between Kells and Mullingar. The address is: Brownstown GAA Club Delvin, Acherstown, Co. Westmeath.
Éire Óg GAA - Cork - was created in 1928.
Erin's Own GAA - Cork - was created in 1963.
Clann na nGael GAA - Cork - was created in 1888.
It is a Gaelic Athletic Association club in county Tipperary. See their website at the link below.