|Rock Island County Sheriff's Office||Rock Island||Illinois 61201||9 miles|
|Scott County Sheriff's Office||Davenport||Iowa 52801||9 miles|
|Mercer County Sheriff's Office||Aledo||Illinois 61231||16 miles|
|Muscatine County Sheriff's Office||Muscatine||Iowa 52761||17 miles|
|Louisa County Sheriff's Office||Wapello||Iowa 52653||28 miles|
|Henry County Sheriff's Office||Cambridge||Illinois 61238||28 miles|
|Cedar County Sheriff's Office||Tipton||Iowa 52772||31 miles|
|Henderson County Sheriff's Office||Oquawka||Illinois 61469||36 miles|
|Warren County Sheriff's Office||Monmouth||Illinois 61462||36 miles|
|Knox County Sheriff's Office||Galesburg||Illinois 61401||38 miles|
|Clinton County Sheriff's Office||Clinton||Iowa 52732||40 miles|
|Jackson County Sheriff's Office||Maquoketa||Iowa 52060||44 miles|
|Johnson County Sheriff's Office||Iowa||Iowa 52240||45 miles|
|Whiteside County Sheriff's Office||Morrison||Illinois 61270||47 miles|
A sheriff is an elected law enforcement official who serves a specific county. Many of the responsibilities of the sheriff overlap with those of local police departments. The biggest difference is that a sheriff has jurisdiction over the entire county, while police departments can only enforce laws within city limits.
While sheriffs share law enforcement duties with city police officers, their degree of responsibility varies by jurisdiction. Municipalities with limited resources often contract law enforcement services to the sheriff, especially for complex crimes where they may not be equipped to conduct a detailed investigation.
Sheriffs tend to be more involved in cases where a suspect operates across city lines. Since they have the authority to investigate crimes and make arrests in any city in their jurisdiction, they often act as a bridge between various municipal law enforcement agencies in that jurisdiction.