The NFL Night Series was an Australian rules football tournament which was contested annually from 1976 until 1979.
In 1977, a rival competition was established in Victoria in the form of the Australian Football Championships Night Series (AFC).
The Night Series was an extended competition which ran concurrently with the premiership season, featuring multiple teams from each state, who initially qualified based on their finishing positions in the previous year.
Most of the matches were played on weekday nights and broadcast live to a national television audience, which was a new sponsorship opportunity which the sport had never previously enjoyed.
There were a total of 12 clubs: five from the VFL, four from the SANFL and three from the West Australian National Football League, with qualification based on performance in the 1975 season.