Group 20 is a rugby league competition in the region of Griffith, New South Wales, Australia.

The best five teams then play-off according to the McIntyre system, culminating in the Group 20 Grand Final, which is traditionally held at E.W.

The defending premiers are the Leeton Greenies, who won their eighth title in 2023 after finishing the regular season in second place.

In 1966, four Group 20 clubs (and a number of Group 9 clubs including Gundagai, Junee and Tumut) broke away from their competitions to form the rebel Murrumbidgee Rugby League broke away from the Country Rugby League, leading to four years of reshuffled boundaries from 1967 to 1970.

Yenda became the first Group 20 side to win the prestigious Clayton Cup as the best team in the state in 2009, when they won their sixth premiership of the decade.