WThe All-Ireland Rugby League Championship was first played for in 1997 under the title All-Ireland Challenge Cup. Since then it has also been known as the All-Ireland League, Elite League and the All-Ireland Championship.
WThe League of Ireland First Division, also known as the SSE Airtricity League First Division, is the second level division in both the League of Ireland and the Republic of Ireland football league system. The division was formed in 1985. It replaced the League of Ireland B Division as the League of Ireland's second level division. Since 2003 the First Division has operated as a summer league.
WThe League of Ireland Premier Division, also known as the SSE Airtricity League Premier Division, is the top level division in both the League of Ireland and the Republic of Ireland football league system. The division was formed in 1985 following a reorganisation of the League of Ireland. St Patrick's Athletic and Bohemians are the only current League of Ireland clubs never to have been relegated from the Premier Division. Since 2003 the Premier Division has operated as a summer league.
WThe National Football League is an annual Gaelic football competition between the senior county teams of Ireland plus London. Sponsored by Allianz, it is officially known as the Allianz National Football League.
WThe PRO14 is an annual rugby union competition involving professional sides from Ireland, Italy, Scotland and Wales. The league is one of the three major professional leagues in Europe, the most successful European teams from which go forward to compete in the European Rugby Champions Cup, the pan-European championship which replaced the Heineken Cup after the 2013–14 season.
WThe Ulster Senior League is an association football league featuring amateur, intermediate, and League of Ireland reserve teams. Together with the Leinster Senior League Senior Division and the Munster Senior League Senior Premier Division, it forms the third level of the Republic of Ireland football league system. Ulster Senior League teams also compete in the FAI Cup and the FAI Intermediate Cup. The winners of the Ulster Senior League have also been invited to play in the League of Ireland Cup. Despite using the Ulster name in its title, almost all of its clubs are based in County Donegal. The most successful club in the league has been Fanad United who have won fourteen league titles and ten league cups. Since 2006 the USL has operated as a summer league with the season typically operating from April to October.
WThe Women's National League is the top-level league for women's association football in the Republic of Ireland. It is organised by the Football Association of Ireland and the Women's Football Association of Ireland. The LFAI previously organised a women's national league known as the Ladies League of Ireland or the Woman's League of Ireland during the 1970s and 1980s. The current league was founded in 2011 and the inaugural winners were Peamount United. The winners qualify for the UEFA Women's Champions League.