Black Diamond Conference
Former Members
Columns: School | Location | Nickname(s) | Colors | Years Member
Cairo High School | Cairo, Illinois | Pilots Co-Pilots | Blue White | 1992-2003 (affiliate) 2003-2008 | Carbondale University High School | Carbondale, Illinois | Lynxes | Maroon Gray | 1963–1968 | Carterville High School | Carterville, Illinois | Lions Lady Lions | Navy Blue Orange | 1949-1973 1975-2010 | Elkville High School | Elkville, Illinois | Bluebirds | Blue White | 1949-1962 | Sesser High School | Sesser, Illinois | Red Devils | Maroon White | 1949-1963 | Zeigler High School | Zeigler, Illinois | Purple Tornadoes | Purple White | 1949-1962