The 1984 New Zealand National Soccer League was the 15th season of a nationwide round-robin club competition in New Zealand football. Gisborne City finally wrestled the trophy away from the major centres, taking it to a provincial city for the first time.
Dunedin Technical did not apply for re-entry to the league, so the resumption of play-offs for league places was simply between the winners of the northern, central, and southern leagues (Auckland University, Stop Out, and Rangers respectively). Auckland University were victorious, entering the national league for the first time.
Gisborne City produced a marked improvement on their previous efforts, becoming the first team from outside Auckland, Wellington, and Christchurch to take the title. The win was a very popular one, and was in large part due to the work of Kevin Fallon. The side were only defeated once all season, by Manurewa, and followed that loss up with a string of six victories which produced an aggregate goal tally of 18-0. The side amassed a total of 59 goals, second only to Wellington's runaway 1979 performance. Papatoetoe were also a popular side, and their second season in the league saw them in title contention until a form slump in the latter part of the season. They still held on to finish second, ahead of Christchurch United, whose title run was also badly hampered by poor late-season form. Manurewa showed little of the form that they had displayed in their championship-winning 1983 campaign. The team was in the league's basement for the early p[art of the season, and never fully recovered, though they did pull themselves up into the top third of the table by season's end.