| Girls Softball Undefeated Teams | |||
| Year | Class | School | Wins |
|---|---|---|---|
| 2008 | AA | Mattoon | 20 |
| 2007 | AA | Metamora GS | 29 |
| 2004 | AA | Stanford Olympia | 24 |
| 2003 | AA | Stanford Olympia | 26 |
| 1999 | Glasford Illini Bluffs | 26 | |
| 1997 | Casey-Westfield | 19 | |
| 1996 | East Peoria Central | 26 | |
| 1995 | Casey-Westfield | 22 | |
| 1994 | Casey-Westfield | 22 | |
| 1990 | Casey Westfield | 19 | |
| 1989 | Williamsville | 15 | |
| 1984 | Casey Westfield | 12 | |
| 1983 | Casey Westfield | 15 | |
| 1982 | Cahokia Wirth | 12 | |
| 1981 | Metamora St. Mary's | 20 | |
| 1980 | Cahokia Wirth | 14 | |
| 1978 | Riverton | 15 | |