The National Rugby League is the top level rugby league competition in Australia and New Zealand. It was formed in 1998 after the merger of the Australian Super League and the Australian Rugby League. Inaugurally containing 20 teams, rationalisation cut this number down to 14 by 2000, before the competition expanded back to 16 in 2007 and 17 in 2023. Debate regarding the expansion of the competition to 18 and even 20 teams is ongoing.