Ann Arbor Police Chiefs and Marshals
| Marshal H. K. Stanley | 1847-1848 |
| Marshal Samuel Sutherland | 1848-1850 |
| Marshal Nelson B. Nye | 1850-1851 |
| Marshal Joseph Godfrey | 1851-1852 |
| Marshal Roger Natthews | 1853-1858 |
| Marshal Oliver M. Martin | 1858-1859 |
| Marshal Stephen Webster | 1859-1860 |
| Marshal Jerome Ganson | 1860-1861 |
| Marshal Oliver M. Martin | 1861-1864 |
| Marshal Richard Dillon | 1864-1865 |
| Marshal Oliver M. Martin | 1865-1866 |
| Marshal D. J. Loomis | 1866-1867 |
| Marshal Nathan Pierce | 1867-1868 |
| Marshal George W. Efner | 1868-1869 |
| Marshal Nathan Pierce | 1869-1870 |
| Marshal Ambrose Robinson | 1870-1871 |
| Marshal I. H. Peebels | 1871-1872 |
The city council enacted an ordinance establishing the police department in 1871. Prior to the establishment of the police department the marshal was elected as the city's chief law enforcement officer.
Marshal Peebels was the first marshal to serve under the newly established Ann Arbor Police Department, making him the city's first police chief, although the position was still referred to as marshal.
| Marshal Erastus LeSuer | 1872-1873 | |
| Marshal James J. Parshall | 1873-1874 | |
| Marshal John Loveland | 1874-1875 | |
| Marshal E. Stiling | 1875-1875 | Marshal Stiling died while in office. |
| Marshal A. H. Heron | 1875-1876 | |
| Marshal George Cook | 1876-1877 | |
| Marshal John Johnson | 1877-1881 | |
| Marshal Thomas Clarken | 1881-1882 | |
| Marshal John Nowland | 1882-1884 | |
| Marshal Chas L. Fall | 1884-1886 | |
| Marshal Fred Sipley | 1886-1889 | |
| Marshal William Walsh | 1889-1890 | |
| Marshal James Murray | 1890-1893 | |
| Marshal Charles Wheeler | 1893-1894 | |
| Marshal Parris Banfield | 1894-1895 | |
| Marshal Melvin Peterson | 1895-1897 | |
| Marshal Zenas Sweet | 1897-1899 | |
| Marshal William Gerstner | 1899-1901 | |
| Marshal Frank Warren | 1901-1902 | |
| Marshal Orton Kelsey | 1902-1905 | |
| Marshal Charles Masten | 1905-1907 |
During his tenure, Marshall Masten was shot in the stomach while attempting to make an arrest on the city's northside. While he was recovering from his wounds, William Eldert was appointed acting marshal.
| Marshal Theodore Apfel | 1907-1913 |
| Marshal John Keeny | 1913-1915 |
| Marshal Frank Pardon | 1915-1916 |
| Marshal Pardon died while in office. |
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| Chief Thomas O'Brien | 1916-1933 |
Looking through this list one might wonder why there were so many marshals in the beginning of the department's history. The reason for this was the marshals were appointed by the mayor, who ran for office every two years. New mayors tended to bring in new marshals. When the police commission was established in 1923, this three member board made all the personnel decisions and hiring the chief was one of their duties. Chief O'Brien was first chief hired by the commission. Chief O'Brien's 17 years as chief of police make him the longest serving chief in the department's history.
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| Chief Lewis Fohey | 1933-1939 |
During his tenure, Chief Fohey was granted a leave of absence from the department due to a serious illness. He was hired by the department in 1919, promoted to sergeant in 1924 and to chief in 1933. Chief Fohey died in office, the third chief in a row to do so.
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| Chief Norman Cook | 1939-1941 |
Chief Cook served as a beat and motorcycle officer before being promoted to sergeant in 1926, a position he would hold until 1939, when he was appointed chief. Chief Cook suffered a heart attack and died on July 2, 1941.
| Chief Sherman Mortenson | 1941-1946 |
Chief Mortenson was hired by the department in 1923, promoted to sergeant in 1927 and to chief in 1941. Chief Mortenson resigned from the police department in 1946, due to a grand jury probe of the police department. While he was eventually cleared of any wrongdoing, Lt. Eugene Gehringer was fired from the department due to alleged ties to gamblers.
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| Chief Casper Enkemann | 1946-1960 |
Casper Enkemann was hired by the department in 1930 and served as a beat, traffic and motorcycle officer before being promoted to sergeant in 1939. He was promoted to lieutenant in 1944, captain in 1946 and then to chief upon the resignation of Chief Mortenson.
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| Chief Rolland “Barney” Gainsley | 1960-1966 |
Barney Gainsley was hired by the department in 1935, promoted to sergeant in 1941, lieutenant in 1944 and captain in 1946. In May of 1953 he was placed in charge of all the departmental divisions and was second in command. On July 1, 1959, a new position of deputy chief was created specifically for Captain Gainsley. He was promoted to chief in 1960.
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| Chief Walter Krasny | 1966-1980 |
Chief Krasny joined the department in 1939, promoted to detective in 1946, sergeant in 1948, lieutenant in 1951, captain in 1960 and deputy chief in 1962. Chief Krasny served as chief during what was arguably the most combative period in the department's history.
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| Chief William Corbett | 1980-1990 |
Chief Corbett was first chief to be hired from outside the ranks of the department. Chief Corbett served for more than 20 years with the Detroit Police Department.
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| Chief Douglas Smith | 1991-1994 |
Chief Smith came to the department from the Minneapolis, Minnesota Police Department, where he served as a deputy chief. Chief Smith's tenure was very short, as he left the department to become the chief of police in Tucson, Arizona. Deputy Chief Walter Lunsford served as interim chief, after Chief Smith resigned.
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| Chief Carl Ent | 1995-2000 |
Chief Ent came to Ann Arbor from the Muncie, Indiana Police Department, where he served as chief for five years. Chief Ent resigned from the police department in January of 2000, due to three internal lawsuits filed by departmental employees. Deputy Chief Walter Lunsford again served as the interim chief until a replacement was found.
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| Chief Daniel Oates | 2001(-2005) |
Chief Oates came to Ann Arbor from the New York City Police Department. Chief Oates retired as the Executive Officer and second-in-command of the Patrol Borough Brooklyn South, where he supervised 3,000 patrol officers and was responsible for all patrol services for 1.4 million residents in New York City's largest borough. Between 1997 and 2001, Chief Oates served as the Commanding Officer of the NYPD's Intelligence Division.
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| Chief Barnett Jones | 2006- (joined force after the publication of this book) |