| Competition: | MacWhirter Welsh League Division Two |
| Season: | 2011–12 |
| Winners: | Monmouth Town |
| Promoted: | Caerleon Monmouth Town Tata Steel |
| Relegated: | Bettws Newcastle Emlyn Treharris Athletic Western |
| Biggest Home Win: | Monmouth Town 8–2 Caldicot Town 31 August 2011 Aberbargoed Buds 7–1 Treharris Athletic Western 15 October 2011 Monmouth Town 6–0 Caerau 15 October 2011 Tata Steel 6–0 Treharris Athletic Western 28 January 2012 Caerleon 6–0 Caerau 24 March 2012 Monmouth Town 6–0 Bettws 25 March 2012 |
| Biggest Away Win: | Treharris Athletic Western 1–8 Monmouth Town 5 November 2011 |
| Highest Scoring: | Monmouth Town 8–2 Caldicot Town 31 August 2011 Treharris Athletic Western 6–4 Caerleon 26 November 2011 |
| Matches: | 240 |
| Total Goals: | 850 |
| Prevseason: | 2010–11 |
| Nextseason: | 2012–13 |
The 2011–12 Welsh Football League Division Two began on 13 August 2011 and ended on 12 May 2012.
AFC Porth, Cwmaman Institute and Ton Pentre were promoted to the Welsh Football League Division One.
Caldicot Town, Garden Village, Penrhiwceiber Rangers were relegated from the Welsh Football League Division One.
AFC Llwydcoed, Abertillery Bluebirds and Llangeinor were relegated to the Welsh Football League Division Three.
Caerau, Monmouth Town and Tata Steel were promoted from the Welsh Football League Division Three.