2018–19 Western Football League Division One

The First Division will consist of 18 clubs, reduced from 22 the previous season, after Roman Glass St George and Westbury United were promoted to the Premier Division, Almondsbury and Malmesbury Victoria were transferred to the Hellenic League Division One West, and Portishead Town and Warminster Town were relegated. Two new clubs joined:


 * Longwell Green Sports, relegated from the Premier Division.
 * Wells City, relegated from the Premier Division.


 * Warminster Town, successfully appealed against their relegation.
 * Portishead Town, successfully appealed against their relegation.