League (click link for league history and tables) Dates/data availability
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Anglesey League 1895-98 possibly later, 1921-31, 1933-39, 1947 to present.
YES
Bangor & District League 1930-37, 1945-50
Caernarfon & District League 1950 to 2014, successor to Bangor & District League
COMPLETE
Caernarfonshire & District League 1900-
Cambrian Coast League 1905 - 1963
Cambrian League 1896 - ? / 1911-14
Cefn & District League 1929-39
YES
Clwyd Football League 1974 to 2011
YES
Denbighshire League 1897-1902
YES
Dyserth League 1931-39, then 1947-75
East Denbighshire Amateur League 1936-37...
Fflintshire League 1900-09 & 1919-41, 1945-53
Ffrith & District League 1919-25
Flintshire Coast League 1919-1921
Gwynedd Football League 1984 to present day
COMPLETE
Gwyrfai League 1921-1930
Halkyn Mountain League 1946 to 1975
Lleyn & District League 1936-39 & 1945-48
YES
Maelor Amateur Village League 1923-1928
YES
Mold & District Area League 1935-36 for one season. Re-established 1937 > ?
Mold, Buckley & Deeside League 1919 to 1932?
North East Wales League 2011 to date
North Wales Alliance 1912-14 and 1920-21
YES
North Wales Coast League 1893-1921 and 1933-35
COMPLETE
North Wales Football Combination 1930-33
COMPLETE
Prestatyn & District League 1911? to 1914
Rhyl & District League 1919 to 1921
South Caernarfonshire League 1901-02
The Combination 1890-1911
Vale of Clwyd & Conwy League 2011 to date
Vale of Clwyd League 1920 to 1925
Vale of Conwy League 1921-24 and 1929-2002
YES
Welsh Alliance League 1984 to date
COMPLETE
Welsh Football League 1930-35
COMPLETE
Welsh Junior League 1895 to 1898
Welsh League North 1934-84 then as Welsh Alliance League
COMPLETE
Welsh National League (North) 1921-30
Welsh National League (Wrexham Area) 1945 to present day
YES
Welsh Senior League 1890 to 1897
COMPLETE
Wrexham & District Amateur League 1925 to 1939
YES