Jersey County is located in the southwestern part of Illinois, in the United States. It is part of the St. Louis, MO-IL Metropolitan Statistical Area. The county seat is Jerseyville.

The county is governed by a seven-member board of commissioners, elected from seven districts. The board is responsible for setting policy and overseeing the county's budget. The county also has a county administrator, who is responsible for the day-to-day operations of the county.

The county is served by the Jersey Community Unit School District 100, which operates seven elementary schools, two middle schools, and one high school.

The county is also served by the Jersey County Sheriff's Office, which is responsible for law enforcement and the operation of the county jail. The county also has a state's attorney, who is responsible for prosecuting criminal cases.

The county is served by the Jersey County Health Department, which is responsible for providing public health services to the county. The department also provides environmental health services, such as water testing and food safety inspections.

The county is served by the Jersey County Emergency Management Agency, which is responsible for coordinating emergency response and recovery efforts in the county. The agency also provides emergency preparedness information to the public.

For the most up-to-date and in-depth information, please check the public records links below.