2018–19 Northern Football League Division One

Division One consisted of 20 clubs, however Team Northumbria resigned from the league and disbanded during the close season, and Blyth resigned shortly after the start of the season, after playing three games.

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