This is a list of rugby league competitions in Australia with their respective premiers. This list contains only the first-grade tier for professional competitions as well as country and statewide semi-professional youth competitions.
Formed as Group 18 in 1946 but when the boundaries were re-drawn in 1966 to include three new clubs the group's name was changed to Group 3.
Group 5 was the local competition from 1961 until it merged with another local competition to form Group 19 in 1980.
This competition was formed by Group 8 and Group 19 which were formed in 1932 and 1946 respectively.
Formed as Berrima District Rugby League and changed its name to Group 6 in 1946.
Formed as South Coast Rugby League and changed its name to Group 7 in 1955.
Formed in 1947 as a junior competition for Newcastle club, Lakes United. It was upgraded to full CRL membership as Group 12 in 1967 then renamed in 1981.