Some areas are prone to excessive speeding or other serious traffic violations. If you are aware of one of these areas within unincorporated McHenry County, please let us know so that we may better enforce speed limits.
Request Speed Watch
Contact Directory
The McHenry County Sheriff's Office
Phone: 815-338-2144
Email: sheriff@mchenrycountyil.gov
Corrections
Jail Main Office: 815-338-9396
Jail Visitation: 815-334-4745
Administration
Civil Process Division: 815-334-4720
Community Relations: 815-334-4739
Records Divisions: 815-334-4770
Operations
Crime Stoppers: 800-762-STOP
Detectives: 815-334-4750
Patrol (Main Office): 815-334-4480
Patrol (Algonquin Substation): 847-829-9259
Stay in Touch