| Term | Name of Trustee | |
| 1975-1981 | William Lindoerfer | |
| 1980-1981 | Verne Adamson | |
| 1981 | Lester Keeney | |
| 1981 | Kathryn Keeney | |
| 1982 | Larry Koesche | |
| 1982 | Martha Muscgrave | |
| 1982-1986 | Dennis Truelsen | |
| 1985-1988 | Ron Lammers | |
| 1985 | Glen Dobosz | |
| 1986-1993 | Roger Blocker | |
| 1988-2007 | William Lindoerfer | |
| 1989-1990 | Janet Theitje | |
| 1989-1993 | Daniel Chally | |
| 1989-1993 | Gordon Mueller | |
| 1989-1993 | Rudolph Geier | |
| 1990-1990 | Larry Steele | |
| 1990-1993 | Lynn Boyle | |
| 1990-1999 | Everett Clark Jr. | |
| 1993-1996 | Dan Helsdon | |
| 1993-1997 | Dawn Myers | |
| 1993-1998 | Robin Brown | |
| 1997-2001 | Clifford Surges | |
| 1997-2009 | Ron Mengarelli | |
| 1997-2001 | Tom Wajda | |
| 1999-2003 | Charleen Carlsen | |
| 1999-2003 | William Davidowski | |
| 2001-2007 | Sam Boytor | |
| 2002-2003 | Robert Schuricht | |
| 2003-2005 | Jesse Garcia | |
| 2003-2007 | Tom Wajda | |
| 2003-2009 | Gordon Mueller | |
| 2005-2015 | Patricia Mierisch | |
| 2007-2010 | Jesse Garcia | |
| 2007-2011 | Bruce Erbeck | |
| 2009-2013 | Everett Clark Jr. | |
| 2010-2011 | Pete Cullotta | |
| 2013-2017 | David LeClercq | |
| 2015-2020 | Elissa Kojzarek | |
| 2020-2021 | Kurt Kojzarek | |
| 2009-2021 | Nancy Farrell | |
| 2011-2023 | Daniel Corbett | |
| 2011-2023 | Louis Hacker |
