1920–21 Western Football League
|Champions||Bristol City Reserves
Peasedown St John
The 1920–21 season was the 24th in the history of the Western Football League.
The Division One champions this season were Bristol City Reserves, for the second time in their history. Champions of Division Two were Peasedown St John, who gained promotion to Division One along with Trowbridge Town.
- Abertillery Town
- Cardiff City Reserves, rejoining the league after leaving in 1914
- Cardiff Corinthians
- Exeter City Reserves
- Mid Rhondda
- 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.
|1||Bristol City Reserves||30||18||5||7||58||27||2.15||41||Moved to the Southern League|
|2||Cardiff City Reserves||30||20||1||9||64||42||1.52||41||Left at the end of the season|
|3||Abertillery Town||30||16||7||7||61||35||1.72||39||Left at the end of the season|
|4||Swansea Town Reserves||30||15||8||7||60||29||2.07||38||Moved to the Southern League|
|5||Douglas||30||15||8||7||52||32||1.62||38||Left at the end of the season|
|6||Pontypridd||30||15||6||9||60||40||1.5||36||Left at the end of the season|
|7||Yeovil and Petters United||30||13||6||11||52||46||1.13||32|
|8||Bath City||30||12||7||11||45||45||1||31||Moved to the Southern League|
|9||Swindon Town Reserves||30||12||6||12||62||50||1.24||30||Moved to the Southern League|
|10||Exeter City Reserves||30||10||9||11||48||53||0.91||29||Moved to the Southern League|
|11||Bristol Rovers Reserves||30||10||5||15||46||53||0.87||25||Moved to the Southern League|
|12||Ton Pentre||30||10||5||15||43||60||0.72||25||Left at the end of the season|
|14||Mid Rhondda||30||8||6||16||23||57||0.4||22||Left at the end of the season|
|15||Barry Reserves||30||6||5||19||33||72||0.46||17||Left at the end of the season|
Three new clubs joined Division Two this season, and the number of clubs increased from eight to ten after Yeovil and Petters United were promoted.
|1||Peasedown St John (P)||18||13||3||2||34||12||2.83||29|
|3||Trowbridge Town (P)||18||10||3||5||36||18||2||23|
1 The system of using goal average to separate two teams tied on points was used up to and including the 1976–77 season.
2 The points system: 2 points for a win, 1 point for a draw and 0 points for losing.
- Robinson, Michael (ed.), Non-League Football Tables 1889–2006, Soccer Books, 2006