The Northern League One (known as the HIT Northern League One for sponsorship reasons) is a regional Australian semi-professional soccer league comprising teams from New South Wales. The league sits at Level 2 on the Northern New South Wales league system (Level 3 of the overall Australian league system). The competition is administered by Northern NSW Football, the governing body of the sport in the northern region of the state (the southern region governed by Football NSW). Prior to 2014, the league was formally known as the New FM 1st Division / Northern NSW State League Division 1 from 1998 to 2013 and the Northern NSW Football League Division Two from 1948 to 1997.
From the end of 2024 season, there will be promotion and relegation between Northern League One and Zone League One.