Index of Member Schools
— Ida Crown, see Chicago (Ida Crown)— Illiana Christian, see Lansing (Illiana Christian)
— Illini Bluffs, see Glasford (Illini Bluffs)
— Illini Central, see Mason City (Illini Central)
— Illini West, see Carthage (Illini West)
— Illinois Lutheran, see Crete (Illinois Lutheran)
— Illinois Math and Science Academy, see Aurora (Illinois Math and Science Academy)
— Illinois School for the Deaf, see Jacksonville (Illinois School for the Deaf)
— Illinois School for the Visually Impaired, see Jacksonville (Illinois School for the Visually Impaired)
— Illinois Valley Central, see Chillicothe (Illinois Valley Central)
— Immaculate Conception, see Elmhurst (Immaculate Conception)
— Indian Creek, see Shabbona (Indian Creek)
— Iroquois West, see Gilman (Iroquois West)
— Islamic Foundation, see Villa Park (Islamic Foundation)