| 2021 | Agricultural Power Diagnostics | 3rd | Mack Plotner |
| 2025 | Agronomy | 5th | Josie Ufferman |
| 2025 | Agronomy | 2nd | Olivia Ehrick |
| 2025 | Agronomy | 1st | Jackson Evans |
| 2024 | Agronomy | 5th | Kinley Balzer |
| 2024 | Agronomy | 4th | Reese Spriggs |
| 2024 | Agronomy | 3rd | Zach Howald |
| 2023 | Agronomy | 4th | Kaylee Rensel |
| 2023 | Agronomy | 3rd | Madelyn Zimmerman |
| 2023 | Agronomy | 2nd | Aubrey Brown |
| 2023 | Agronomy | 1st | Allison Stacklin |
| 2022 | Agronomy | 5th | Cenlee Holloway |
| 2022 | Agronomy | 1st | Chloe Hall |
| 2022 | Agronomy | 4th | Madelyn Taylor |
| 2022 | Agronomy | 2nd | Glade Jolliff |
| 2021 | Agronomy | 3rd | Mack Plotner |
| 2021 | Agronomy | 4th | Lilly Taylor |
| 2019 | Agronomy | 4th | Dean Wolfe |
| 2019 | Agronomy | 3rd | Avery Zwayer |
| 2019 | Agronomy | 1st | Kaylee Smith |
| 2018 | Agronomy | 3rd | Kaylee Smith |
| 2018 | Agronomy | 1st | Avery Zwayer |
| 2017 | Agronomy | 4th | Sarah Chadwick |
| 2017 | Agronomy | 1st | Abby Chadwick |
| 2017 | Agronomy | 2nd | Grayson Plotner |
| 2017 | Agronomy | 3rd | Carter Wedding |
| 2016 | Agronomy | 1st | Grayson Plotner |
| 2016 | Agronomy | 5th | Josie Stimmel |
| 2015 | Agronomy | 4th | Claire Wolfe |
| 2015 | Agronomy | 1st | Mikaela Ramsey |
| 2015 | Agronomy | 2nd | Robert Kramer |
| 2015 | Agronomy | 3rd | Grace Hall |
| 2014 | Agronomy | 2nd | Taylor Bahan |
| 2014 | Agronomy | 3rd | Madison Shawver |
| 2013 | Agronomy | 1st | Kolton Ingles |
| 2013 | Agronomy | 2nd | Molly Bayer |
| 2013 | Agronomy | 4th | Austin Davis |
| 2013 | Agronomy | 5th | Jordyn Rhodeback |
| 2012 | Agronomy | 3rd | Jordyn Rhodeback |
| 2011 | Agronomy | 3rd | Justin Gravatt |
| 2011 | Agronomy | 2nd | Kayla Dysert |
| 2011 | Agronomy | 1st | Skyler Foos |
| 2010 | Agronomy | 1st | Kyle Dresback |
| 2009 | Agronomy | 5th | Michelle Shepherd |
| 2009 | Agronomy | 2nd | Isaac Oman |
| 2009 | Agronomy | 4th | Matt Ross |
| 2009 | Agronomy | 3rd | Robert Bevis |
| 2008 | Agronomy | 2nd | Isaac Oman |
| 2007 | Agronomy | 4th | Kyle Gravatt |
| 2007 | Agronomy | 3rd | Tyler Smith |
| 2007 | Agronomy | 1st | Adam Conrad |
| 2006 | Agronomy | 2nd | Adam Conrad |
| 2006 | Agronomy | 4th | Tyler Smith |
| 2006 | Agronomy | 5th | Kyle Gravatt |
| 2005 | Agronomy | 2nd | Tara Zasadzinski |
| 2005 | Agronomy | 3rd | Luke Brill |
| 2004 | Agronomy | 1st | Jake Davis |
| 2004 | Agronomy | 4th | Rusty Lowe |
| 2004 | Agronomy | 2nd | Brett Sheets |
| 2003 | Agronomy | 1st | Mark Bugg |
| 2003 | Agronomy | 4th | Zach Welch |
| 2003 | Agronomy | 2nd | Talyn Powers |
| 2000 | Agronomy | 5th | Bethany Davis |
| 2000 | Agronomy | 3rd | Robert Disbennett |
| 1998 | Agronomy | 3rd | Scott Bugg |
| 1998 | Agronomy | 2nd | Jared Evans |
| 1997 | Agronomy | 4th | Jared Evans |
| 1994 | Agronomy | 1st | Tim Goodwin |
| 1993 | Agronomy | 1st | Murphy Foreman |
| 1992 | Agronomy | 3rd | Murphy Foreman |
| 1991 | Agronomy | 4th | Murphy Foreman |
| 1988 | Agronomy | 1st | Clint Hines |
| 1988 | Agronomy | 2nd | Doug Karcher |
| 1988 | Agronomy | 3rd | Elmer Arbogast |
| 1987 | Agronomy | 5th | Doug Karcher |
| 1987 | Agronomy | 3rd | Clint Hines |
| 1982 | Agronomy | 5th | John Bialecki |
| 1980 | Agronomy | 2nd | Steve Kidwell |
| 1979 | Agronomy | 5th | Steve Kidwell |
| 1979 | Agronomy | 2nd | Gary Brill |
| 1978 | Agronomy | 4th | Gary Brill |
| 2023 | Equine Management | 2nd | Layni Wills |
| 2000 | Equine Management | 4th | Sarah Kusey |
| 1998 | Equine Management | 1st | Holli Clady |
| 1999 | General Livestock | 5th | Becky Brill |
| 1999 | General Livestock | 2nd | Lance Ridge |
| 2009 | Greenhand Quiz | 2nd | Ann DePauw |
| 2024 | Job Interview | 1st | Chloe Dickey |
| 2021 | Job Interview | 2nd | Kaylee Brestle |
| 2018 | Job Interview | 3rd | Kaylee Smith |
| 2010 | Job Interview | 4th | Reagan Stofcheck |
| 1985 | Mammals | 3rd | Rick Sims |
| 1982 | Mammals | 3rd | Mike Hall |
| 1982 | Mammals | 5th | Ken Cox |
| 1981 | Mammals | 4th | Ken Cox |
| 2002 | Meats Evaluation and Technology | 4th | James Jolliff |
| 2022 | Milk Quality and Products | 4th | Amanda Adams |
| 2014 | Poultry Management | 2nd | Alexis Shawver |
| 2011 | Poultry Management | 3rd | Lindsey Pfeiffer |
| 1999 | Poultry Management | 4th | Kate MacFarlane |
| 1997 | Poultry Management | 5th | Jennifer Bahan |
| 1985 | Poultry Management | 2nd | Richard Buettner |
| 1984 | Poultry Management | 3rd | Richard Buettner |
| 1982 | Poultry Management | 3rd | Kevin Buyer |
| 1982 | Poultry Management | 1st | Richard Brill |
| 1982 | Poultry Management | 5th | Mark Clevenger |
| 1981 | Poultry Management | 1st | Kevin Buyer |
| 1979 | Poultry Management | 2nd | Richard Brill |
| 1978 | Poultry Management | 1st | Dave Oman |
| 1978 | Poultry Management | 4th | Dan Hall |
| 1976 | Poultry Management | 4th | Denny Hall |
| 1976 | Poultry Management | 1st | Jeff Brill |
| 1975 | Poultry Management | 5th | Jeff Brill |
| 2018 | Public Speaking | 3rd | Kaylee Smith |
| 2014 | Public Speaking | 3rd | Shelby Furer |
| 1996 | Public Speaking | 2nd | Holli Clady |
| 1995 | Public Speaking | 1st | Holli Clady |
| 1984 | Public Speaking | 1st | Barb Parish |
| 1983 | Public Speaking | 1st | Barb Parish |
| 1982 | Public Speaking | 2nd | Barb Parish |
| 1981 | Public Speaking | 1st | Barb Parish |
| 2014 | Rural Soils | 1st | Justin Gravatt |
| 1987 | Rural Soils | 1st | Allen Geyer |
| 1982 | Rural Soils | 2nd | Bill Foos |
| 2002 | Wildlife Management | 4th | Craig Springer |
