The 2023–24 Ardal SE season (also known as the 2023–24 Floodlighting and Electrical Services Ardal SE season for sponsorship reasons) was the third season of the new third-tier southern region football in Welsh football pyramid, part of the Ardal Leagues.
The winners (Trethomas Bluebirds) were promoted to the 2024–25 Cymru South.
The runners-up (Newport City) were also promoted after winning the Ardal Southern play-off.
The bottom two teams (Hay St Marys and Lliswerry) and Aberbargoed Buds (who withdrew after the completion of the season) were relegated to Tier 4.
[4] Since no team was relegated from the 2022–23 Cymru South, Treharris Athletic Western were transferred from the Ardal SW (replacing the promoted Ardal SE team of Abertillery Bluebirds).