Candor Central School....................................................... Charter Member
Dryden Central School....................................................... Charter Member
Elmira Notre Dame................................................................. Member 1999
Elmira Heights –Thomas A. Edison School.............................. Member 1977
Groton Central School........................................................ Charter Member
Lansing Central School...................................................... Charter Member
Marathon Central School................................................... Charter Member
Moravia Central School........................................................... Member 1972
Newfield Central School.................................................... Charter Member
Newark Valley Central School................................................ Member 1979
Odessa-Montour Central School............................................. Member 1972
Southern Cayuga Central School............................................ Member 1972
Spencer-Van Etten Central School..................................... Charter Member
Tioga Central School.......................................................... Charter Member
Trumansburg Central School.................................................. Member 1972
Union Springs Central School................................................. Member 1972
Watkins Glen Central School.................................................. Member 1972
Waverly Central School........................................................... Member 1987
Whitney Point Central School................................................. Member 2009