| John W. Haarer | |
| Office: | Treasurer of Michigan |
| Governor: | Woodbridge N. Ferris |
| Term Start: | 1913 |
| Term End: | 1916 |
| Predecessor: | Albert Sleeper |
| Successor: | Samuel Odell |
| Birth Date: | 21 April 1876 |
| Birth Place: | Ann Arbor, Michigan, US |
| Death Place: | Jackson, Michigan, US |
| Party: | Republican |
John W. Haarer (April 21, 1876April 24, 1941) served as the Treasurer of Michigan.
Haarer was born on April 21, 1876, in Ann Arbor, Michigan.[1]
Haarer worked as a banker and in the insurance business. In 1902, Haarer ran for the Michigan House of Representatives seat representing the Washtenaw County 1st district. Haarer served as Treasurer of Michigan from 1913 to 1916 under Governor Woodbridge N. Ferris.[1]
Haarer married Klara A. Bissinger on January 6, 1903. Haarer was affiliated with the Shriners, Elks, and the Freemasons.[1]
Haarer died on April 24, 1941, of a heart attack in Jackson, Michigan.[2]