2024–25 Cymru South

The 2024–25 Cymru South season (also known as the 2024–25 JD Cymru South season for sponsorship reasons) will be the fifth season of the second-tier Southern region football in Welsh football pyramid.

Teams
The league will consist of 16 clubs; 12 clubs remaining from the previous season, 1 club relegated from the Cymru Premier, and 3 clubs promoted from the Ardal Leagues.

Trethomas Bluebirds and Penrhiwceiber Rangers were promoted as champions of the 2023–24 Ardal SE and 2023–24 Ardal SW respectively, while Ardal SE runners-up Newport City defeated Ardal SW runners-up Cefn Cribwr in the Ardal Southern play-off to also earn promotion. The three promoted teams replaced the three relegated 2023–24 Cymru South teams (Abergavenny Town, Abertillery Bluebirds, and Pontardawe Town). Pontypridd United were relegated from the 2023–24 Cymru Premier, replacing the promoted 2023–24 Cymru South winners (Briton Ferry Llansawel).

Managerial changes

 * 1)  Kinsella's resignation was announced during the 2023–24 season, but did not come into effect until the end of the season.

Results
Teams play each other twice on a home and away basis.