History - City Marshal and Deputy City Marshals
Upon incorporation as the city of Pendleton, Pendleton was policed by a City Marshal and Deputy City Marshals.
| Year | City Marshal | Deputy Marshals |
| 1896 | J.T. Van Arsdall Leo Eggerth E. Hulse |
|
| 1898 | John M. Heathman | |
| 1904 | M.J. Carny (Term ended as City Marshal) |
George Mieker |
| 1905- |
O.D. Coffman (June 1, 1905 City Marshall)
|
Manning |
| 1906 |
Gurdane |
J. Bowman |
| 1913 |
Brown
|
George Mieker |
| 1914 |
John M. Heathman
|
George Mieker |
| 1916 |
Hellyer
|
Curtiss |
In September of 1917 the city of Pendleton changed it police structure to the Pendleton Police Department and appointed its first Chief of Police.
| Term Began | Term Ended | Chief of Police |
| September 1917 | April 1928 | Tom Gurdane |
| April 1928 | March 1929 | Roy Montgomery |
| March 1929 | June 1952 (Retired) | Charles Lemons |
| June 1952 | September 1955 | Ralph Bond |
| October 1955 | November 1956 | James Ness |
| December 1956 | January 1986 (Retired) | Ernie Gallaher |
| January 1986 | July 2000 (Retired) | Edwin S. Taber |
| July 2000 | June 2002 | Gary Ward |
| May 2002 | December 2002 (Interim) | Edwin S. Taber |
| January 2003 | Present | Stuart A. Roberts |