2021–22 Ardal SE
The 2021-22 Ardal SE season was the first season of the new third-tier southern region football in Welsh football pyramid, part of the Ardal Leagues, after the cancellation of the previous season due to the COVID-19 pandemic in Wales.
Teams
The league was made up of 16 teams competing for one automatic promotion place to Cymru South, whilst the second-placed team qualified for a play-off with the second-placed team of Ardal SW. Three teams were relegated to Tier 4.Stadia and locations
| Team | Location | Home Ground |
| Aberbargoed Buds | Aberbargoed | Bedwellty Road |
| Abergavenny Town | Abergavenny | Pen-Y-Pound Stadium |
| Abertillery Bluebirds | Abertillery | Abertillery Leisure Centre |
| Abertillery Excelsiors | Abertillery | Jim Owen Field |
| Caldicot Town | Caldicot | Jubilee Way |
| Chepstow Town | Chepstow | Larkfield Park |
| Croesyceiliog | Croesyceiliog | Woodland Road |
| Goytre | Penperlleni | Plough Road |
| Llandrindod Wells | Llandrindod Wells | Lant Avenue Broadway |
| Monmouth Town | Penperlleni | Plough Road |
| Newport City | Newport | Newport Stadium |
| Panteg | Pontymister | Ty-Isaf Park |
| Rhayader Town | Rhayader | The Weirglodd |
| Tredegar Town | Tredegar | Tredegar Leisure Complex |
| Treowen Stars | Newbridge | Bush Park |
| Trethomas Bluebirds | Llanfabon | CCB Centre For Sporting Excellence |
Source: