Founded on December 18, 1904, Butler Council 866 has a long list of Past Grand Knights. This table begins the second century of Grand Knights here in Butler, PA.
| Grand Knight | Term |
| Edguard Lauther | 2025- |
| Edward Smith | 2023-2025 |
| Robert Seibel | 2021-2023 |
| Douglas Morrin | 2019-2021 |
| Mark Daubenspeck | 2012-2019 |
| Ronald Kocian | 2009-2012 |
| Randy Fillhart | 2008-2009 |
| Jeffery Voelker | 2006-2009 |
| Hal McIntosh | 2005-2006 |
| Randy Fillhart | 2004-2005 |