The Teams competing in Division One East Central 2017-18 are isted below. 1. Llanharan RFC
2. Ystrad Rhondda RFC
3. St Josephs RFC
4. Rumney RFC
5. Rhiwbina RFC
6. Heol y Cyw RFC
7. Treorchy RFC
8. Llantrisant RFC
9. Mountain Ash RFC
10. Dinas Powys RFC
11. Porth Quins RFC
12. Glamorgan Wanderers RFC