Southeast Iowa Conference

Former Members
Ainsworth, 1953-54 thru 1959-60
Cardinal, 1981-82 thru 1990-91
Central Lee, 1981-82 thru 1990-91
Columbus Community, 1926-27 thru 1990-91
Danville, 1960-61 thru 1980-81
Highland, 1965-66 thru 1990-91
Lone Tree, 1963-64 thru 1990-91
Louisa-Muscatine, 1963-64 thru 1990-91
Mediapolis, 1925-26 thru 1950-51; 1960-61 thru 1990-91
Morning Sun1925-26 thru 1950-51; 1960-61 thru 1980-81
New London, 1925-26 thru 1980-81
Pekin, 1981-82 thru 1990-91
Wapello, 1925-26 thru 1990-91
Wayland, 1951-52 thru 1961-62
Winfield, 1925-26 thru 1980-81

Membership Timeline
1991-92: All league schools (Cardinal, Central Lee, Columbus Community, Highland, Lone Tree, Louisa-Muscatine, Mediapolis, Pekin, and Wapello) leave to help form the Southeast Iowa Superconference. Conference disbands.
1986-87: Cardinal joins. Membership increases to 9.
1981-82: Winfield-Mt. Union, Danville, New London, and Morning Sun leave to help form the Deerwood Conference. Central Lee and Pekin join from the disbanding Blackhawk Conference. Membership decreases to 8.
1965-66: Highland joins. Membership increases to 10.
1963-64: Lone Tree joins from the disbanding Eastern Iowa Conference. Louisa-Muscatine joins. Membership increases to 9.
1962-63: Wayland consolidates with Crawfordsville and Olds to form WACO. The new school competes in the Blackhawk Conference. Membership is 7.
1961-62: Winfield becomes Winfield-Mt. Union. Membership remains at 8.
1960-61: Danville, Mediapolis, and Morning Sun join form the Lemosa League. Ainsworth leaves for the Tri-County Conference. Membership is 8.
1953-54: Ainsworth joins from the Tri-County Conference. Membership is 6. 
1951-52: Wayland joins. Mediapolis and Morning Sun leave to help form the Lemosa League. Membership decreases to 5.
1926-27: Columbus Junction joins. Membership increases to 6. Conference is renamed the Southeast Iowa Conference.
1925-26: Mediapolis, Winfield, New London, Morning Sun, and Wapello from the Consolidated Five Conference. Original membership is 5.