2018–19 Northern Football League

The 2018–19 Northern Football League season is the 121st in the history of Northern Football League, a football competition in England.

Division One
Division One consists of 20 clubs.

The following 5 clubs left Division One before the season -
 * Billingham Synthonia – relegated to Division Two
 * Jarrow Roofing Boldon Community Association F.C. – folded
 * Marske United - promoted to Northern Premier League Division One East
 * Morpeth Town - promoted to Northern Premier League Division One East
 * Washington – relegated to Division Two

The following 3 clubs joined Division One before the season -
 * Blyth Town – promoted from Division Two
 * Hebburn Town – promoted from Division Two
 * Whickham – promoted from Division Two

Division Two
Division Two consists of 20 clubs.

The following 5 clubs left Division Two before the season -
 * Alnwick Town - relegated to Northern Alliance
 * Blyth Town – promoted to Division One
 * Darlington Railway Athletic - relegated to Wearside League
 * Hebburn Town – promoted to Division One
 * Whickham – promoted to Division One

The following 3 clubs joined Division Two before the season -
 * Billingham Synthonia – relegated from Division One
 * Birtley Town - promoted from Northern Alliance
 * Redcar Athletic - promoted from Wearside League
 * Washington – relegated from Division One