Newspaper reports of its formation in 1900. The area covered by the league was more southerly than at present.

1900-01 Table not yet located
1901-02 Table not yet located
1902-03 Table not yet located
1903-04 Table not yet located
1904-05 Table not yet located
1905-06 Table not yet located
1906-07 Table not yet located
1907-08 Table not yet located
1909-10 Table not yet located
1910-11 Table not yet located
1911-12 Table not yet located
1912-13 Table not yet located
1913-14 Table not yet located
1921-22 Table not yet located
1947/48 table needed for South section [NOT Mid-Wales (South)]
1948/49 table needed for South section [NOT Mid-Wales (South)]
1961/62 table incomplete - all matches were played
1962/63 table incomplete - all matches were played
1963/64 table incomplete - all matches were played
1965/66 Llandrindod Wells ??? - and goals
1971/72 table incomplete - all matches were played
1972/73 goals needed
1973/74 table incomplete - all matches were played
1974/75 goals needed
1998/99 table incomplete
2001/02 Rhayader Town Res record out of sync