| League (click link for league history and tables) | Dates/data availability | Help needed |
| Aberdare Valley Football League | 1904 to 1908, 1909-10, 1923 to present day | |
| Abergavenny & District Junior League | 1922 only, so far | |
| Abergavenny & District League | 1909 (perhaps earlier) to 1910 | |
| Abertillery & District League | ||
| Afan Valley | 1920 to 1922 | |
| Ammanford & District League | 1946-1959 | |
| Barry & District League | 1900 (possibly earlier) for unknown period. 1920 to 1998 | |
| Bridgend & District League | 1911 to 1913. 1928 to 1939. 1951 to present day. | |
| Caerau & District | 1920. 1928 | |
| Caerphilly League | 1920 to 1927, amalgamated with Glamorgan League to form Rhymney Valley & District League | |
| Caldicot & Wye Valley League | 1904 and 1905 | |
| Cardiff & District League | 1897 to present day | |
| Cardiff Combination | 1939 to present day | |
| Carmarthenshire League | 1950 (possibly earlier) to date | |
| Dowlais & District League | 1923 and 1924 | |
| East Gwent League | 1913. ???? to present day | |
| East Monmouthshire League | ||
| Ebbw Vale League | 1920s, amalgamated with Abergavenny league in 1961 to form North Monmouth Amateur League | |
| Ely Valley League | 1920 to 1925 | |
| Garw & Llynfi League | 1947 > ???? | |
| Glamorgan League | 1909 to 1926, became Rhymney Valley League | |
| Gwent Central League | 1913. ???? to present day | |
| Gwent County League | 1980 to present day | |
| Gwent Premier League | 1979 to present day. Formed from amalgamation of Gwent Premier League and Monmouthshire Senior League. | |
| Llanelli & District League | 1910. Possibly 1923? | |
| Merthyr & District League | 1910 to present day but with gaps | |
| Mid-Glamorgan League | 1922 only, so far | |
| Monmouth & District League | 1906 and 1907. 1921 > ? | |
| Monmouthshire Senior League | 1913. 1946? to 1978. Merged with Gwent Premier League to form Gwent County League | |
| Neath & District League | 1912 and 1913, 1931 to present day | |
| Newport & District League | 1901 to present day | |
| North Gwent League | Formerly North Monmouthshire League | |
| North Monmouthshire League | 1925? to present day (as North Gwent League) | |
| North Rhondda League | 1928 to 1964 | |
| Pembrokeshire League | 1901 to 1913. ? to present day | |
| Pontypridd & District League | 1914-40, 1942-91 | |
| Port Talbot & District League | 1923? to present day | |
| Rhondda & District League | 1907, 1920 to present day | |
| Rhondda Fach League | 1930 to 1935 | |
| Rhymney Valley & District League | 1904 to 1909, became the Glamorgan League | |
| Rhymney Valley League | 1927 to 1939, 1952 (perhaps earlier) to 2000. Merged with Taff, Ely and District League | |
| South Monmouthshire League | 1912 and 1913. | |
| South Wales Amateur League | 1912. 1922 to 1927? 1946 to present day | |
| South Wales League | 1890-1911 | |
| South Wales Senior League | 1991 to present day | |
| Swansea & District League | 1900 or 1901 to present day | |
| Taff Ely and Rhymney Valley Alliance | 2000 to present day | |
| Taff, Ely & District League | 1991 to 2000. Merged with Rhymney Valley League | |
| Upper Rhondda League | 1932-1937, possibly 1939.1947 to 1953 (possibly later) | |
| Usk & District League | 1920 > ? Running in 1935-36. | |
| Vale of Glamorgan League | 1998-date as successor to the Barry & District League | |
| West Carmarthenshire League | details not yet available | |