| Competition: | Ardal SW |
| Season: | 2021–22 |
| Winners: | Pontardawe Town |
| Promoted: | Pontardawe Town Ynyshir Albions |
| Relegated: | Ton Pentre West End AFC Porth |
| Prevseason: | 2020–21 |
| Nextseason: | 2022–23 |
The 2021 - 22 Ardal SW season (also known as the 2021 - 22 Floodlighting and Electrical Services Ardal SW season for sponsorship reasons) was the first season of the new third-tier northern 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.[1]
The league was made up of 16 teams competing for one automatic promotion place to Cymru South, whilst the second place team qualified for a play-off with the second-placed team of Ardal SE. Three teams were relegated to Tier 4.
| Team | Location | Home Ground | Capacity | |
|---|---|---|---|---|
| AFC Llwydcoed | Llwydcoed | Welfare Ground | 1,000 | |
| AFC Porth | Porth | Dinas Park | 1,200 | |
| Caerau (Ely) | Cardiff | Cwrt-yr-Ala | 1,000 | |
| Cardiff Draconians | Cardiff | Riverside Ground | 1,000 | |
| Cwmamman United | Glanamman | Grenig Park | 1,500 | |
| Dinas Powys | Dinas Powys | The Murch | 1,500 | |
| Garden Village | Kingsbridge | Stafford Common | 2,000 | |
| Penrhiwceiber Rangers | Penrhiwceiber | Glasbrook Field | 1,000 | |
| Penydarren BGC | Penydarren | The Bont Playing Fields | 1,000 | |
| Pontardawe Town | Pontardawe | Parc Ynysderw | 1,000 | |
| Pontyclun | Pontyclun | Ivor Park | 1,000 | |
| Ton Pentre | Ton Pentre | Ynys Park | 2,000 | |
| Treharris Athletic | Trelewis | Parc Taff Bargoed | 1,000 | |
| West End | Llandarcy | Llandarcy Academy of Sport | 1,000 | |
| Ynyshir Albions | Porth | Dinas Park | 1,200 | |
| Ynysygerwn | Llandarcy | Llandarcy Academy of Sport | 1,000 |