2011–12 Welsh Football League Division One
| Season | 2011–12 | 
|---|---|
| Champions | Cambrian & Clydach Vale | 
| Promoted | Cambrian & Clydach Vale | 
| Relegated | Caerau (Ely) Cardiff Corinthians Cwmaman Institute  | 
| Matches played | 240 | 
| Goals scored | 821 (3.42 per match) | 
| Biggest home win | Cambrian & Clydach Vale 8–0 West End 28 April 2012  | 
| Biggest away win | Caerau (Ely) 1–7 Cambrian & Clydach Vale 22 October 2011 Cwmaman Institute 1–7 Goytre United 10 April 2012  | 
| Highest scoring | Caerau (Ely) 4–7 Haverfordwest County 3 March 2012  | 
← 2010–11  2012–13 →   | |
The 2011–12 Welsh Football League Division One began on 12 August 2011 and ended on 12 May 2012.