| C.P. Connolly* | Butte | 1906-1907 |
| Charles L Meagher | Butte | 1907-1908 |
| Joseph R Jackson | Butte | 1908-1910 |
| James R. Walsh | Helena | 1910-1911 |
| W.M. Enright | Billings | 1911-1913 |
| George J. Joyce | Helena | 1913-1914 |
| John J. O’Neil | Butte | 1914-1916 |
| W.J. Tighe | Great Falls | 1916-1917 |
| Thomas M. Kehoe | Billings | 1917-1918 |
| Thomas L. Hanson | Butte | 1918-1919 |
| Herbert A. Kendall | Kalispell | 1919-1920 |
| Joseph McMahon | Miles City | 1920-1921 |
| Pierre Sanders | Anaconda | 1921-1922 |
| Leon E. Choquette | Havre | 1923-1924 |
| M.F. Hayes | Deer Lodge | 1924-1925 |
| Dismond J.O’Neil | Glendive | 1925-1926 |
| D.W. Fitzpatrick | Missoula | 1926-1928 |
| Hugh N. Marron | Wolf Point | 1928-1929 |
| Thomas F. McCarvel | Anaconda | 1929-1930 |
| Charles w. | Billings | 1930-1931 |
| Phillip G. Greenan | Great Falls | 1931-1933 |
| James J. Nugent | Miles City | 1933-1935 |
| Victo N. Weber | Helena | 1935-1937 |
| Fergus C. Fay | Helena | 1937-1939 |
| Jack L White | Anaconda | 1939-1941 |
| PJ.McDonough | Butte | 1941-1942 |
| P.L.Hagen | Glendive | 1942-1944 |
| Francis R. Guardipee | Cut Bank | 1944-1945 |
| Jack J. Zappone | Lewistown | 1945-1946 |
| Neil Ryan | Bozeman | 1946-1947 |
| Julius Hilgard | Great Falls | 1947-1948 |
| Roman Losieben | Malta | 1948-1949 |
| Grant F. Gainan | Billings | 1949-1950 |
| Leo J. Riley | Butte | 1950-1952 |
| Roderick F. McCarvel | Anaconda | 1952-1954 |
| Frank DiRocco | Great Falls | 1954-1956 |
| Edward Provost | Glendive | 1956-1958 |
| Sidney T. Smith | Billings | 1958-1960 |
| PJJ. Keenen | Anaconda | 1960-1962 |
| Raymond F. Reid | Miles City | 1962-1964 |
| Lawrence D. Ward | Kalispell | 1962-1964 |
| Donald E. Kottas | Lewistown | 1966-1968 |
| Victor Roberts | Billings | 1968-1970 |
| John J. McCarthy | Helena | 1970-1972 |
| Richard C. Aichele | Billings | 1972-1974 |
| John F. Nelson | Great Falls | 1974-1976 |
| Howard Patterson, Jr. | Billings | 1976-1978 |
| Joseph Basile | Bozeman | 1978-1980 |
| Marvin L. Thompson* | Great Falls | 1980-1982 |
| Eugene R. Thomas | Kalispell | 1982-1984 |
| Edward G. Wirtz* | Great Falls | 1984-1986 |
| Arthur M. Habel | Dutton | 1986-1988 |
| Kenneth L. Colman | Billings | 1988-1990 |
| George A. Freemole | Great Falls | 1990-1992 |
| Robert E. Denny | Great Falls | 1992-1994 |
| Thomas E. Sprigler | Laurel | 1994-1996 |
| Joseph (Pete) Malin | Helena | 1996-1998 |
| Wayne J. Beaner | Billings | 1998-2000 |
| Donald J. Hartman* | Miles City | 2000-2002 |
| Arthur C. Gregr | Hamilton | 2002-2004 |
| John J. Glen* | Billings | 2004-2006 |
| Robert Murphy | Billings | 2006-2008 |
| William I. Burke* | Stevensville | 2008-2010 |
| Rodney McElwee | Polson | 2010-2012 |
| Arthur Malisani* | Great Falls | 2012-2014 |
| Steve Zachmann* | Baker | 2014-2016 |
| Ron Kazmierczak* | Thompson Falls | 2016-2018 |
| Allan Cormany* | Helena | 2018-2020 |
| Dan Hallsten* | Belgrade | 2020-2022 |
| Marty Beatty* | Helena | 2022-2025 |
| Bernie Adams* | Helena | 2025- |
* Living as of 2/2026