Eight new clubs joined Division One this season, and the number of clubs increased from 10 to 16 after
Horfield United and
Newport County Reserves left the league. •
Abertillery Town •
Cardiff City Reserves, rejoining the league after leaving in 1914 •
Cardiff Corinthians •
Exeter City Reserves •
Mid Rhondda •
Pontypridd •
Ton Pentre, rejoining the league after leaving in 1910 •
Yeovil and Petters United, promoted from Division Two Abertillery Town, Mid Rhondda, Pontypridd and Ton Pentre were also members of the
Southern League (Welsh section) during this season. All four clubs left the Western League at the end of the season to concentrate on the Southern League. ==Division Two==