2023–24 Northern Football League

The 2023–24 season was the 126th in the history of the Northern Football League, a football competition in England. The league operates two divisions in the English football league system, Division One at Step 5, and Division Two at Step 6.

The allocations for Steps 5 and 6 this season were announced by the Football Association on 15 May 2023. Starting this season, the league's Division One (Step 5) promotes two clubs; one as champions and one via a four-team play-off. This replaced the previous inter-step play-off system. For this season only, there was only one club relegated from the division.

Division One
Division One featured 16 clubs which competed in the division last season, along with four new clubs.
 * Promoted from Division Two:
 * Birtley Town
 * Boro Rangers
 * Demoted/relegated from the Northern Premier League:
 * North Shields
 * Shildon

Division Two
Division Two featured 18 clubs which competed in the division last season, along with four new clubs:
 * FC Hartlepool, promoted from the Wearside League
 * Newcastle Blue Star, promoted from the Northern Alliance
 * Thornaby, relegated from Division One
 * Yarm & Eaglescliffe, promoted from the North Riding League