List of mayors of Crystal Lake, Illinois
The Mayor of Crystal Lake, Illinois presides at all meetings of the city council of Crystal Lake, Illinois, and is otherwise the head of the city government for all ceremonial purposes, and any other purposes determined by the city council, or in emergencies, by the governor. The mayor has no regular administrative duties, as the city operates under a council-manager form of government.
Incorporated on September 23, 1914, Crystal Lake's population stands at 40,743 at the 2010 census.
List
| Name | Start of term | End of term | Notes |
| William Pinnow | 1914 | 1917 | |
| W.A. Goodman | 1917 | 1923 | |
| Benno Raue, Sr. | 1923 | 1927 | |
| Fred Mathis | 1927 | 1931 | |
| John A. Peterson | 1931 | 1940 | |
| Joseph J. Jaster | 1940 | 1941 | |
| George Krause | 1941 | 1953 | |
| Hal Tripp | 1953 | 1957 | |
| Leo Krumme | 1957 | 1959 | |
| Louis J. Goosens | 1959 | 1971 | |
| Anthony Wujcik | 1971 | 1974 | |
| Arlene B. Fetzner | 1974 | 1979 | |
| Carl Wehde | 1979 | 1991 | |
| George Wells | 1991 | 1995 | |
| Robert J. Wagner | 1995 | 1999 | |
| Aaron T. Shepley | 1999 | 2020 | Longest-serving mayor of Crystal Lake, died in office |
| Haig Haleblian | 2020 | Serving in an acting capacity. |