The 1919–20 Northern Football League season was the 27th in the history of the Northern Football League, a football competition in Northern England.
South Bank were crowned champions via a three team playoff after they finished the season on 38 points along with Bishop Auckland and Crook Town.
From the 13 clubs which competed in the 1914–15 season 4 did not reappear: Also 5 new clubs joined the league: