North Simcoe League was an independent league based in Ontario.
1926 - Barrie, Midland, Orillia, Penetang
1927 to 1929 unknown if played
1930 - Barrie, Camp Borden, Creemore
1931 - Penetang enter the league and Creemore has left the League.
1932 - Midland has enter the League
1933 - Orillia enter the League and Camp Borden has left the League.
1934 - No teams enter or left the League.
1935 - Collingwood enter the League.
1936 - Orillia has left the League
1937 - Meaford and Thornburg has enter the League and Collingwood and Midland has left the League.
1938 - Collingwood has enter the League and Thornton has left the League.
1939 to 1950 unknown if played
1951 - Barrie, Creemore, Collingwood, Midland, Orillia
1952 - Penetang entered the League.
1953 - Shallow Lake entered the league; Penetang left the league.
1954 - Collingwood and Shallow Lake left the league.