Peoria County is located in the U.S. state of Illinois. The county seat is Peoria, the largest city in the state outside of the Chicago metropolitan area.

Peoria County is part of the Peoria, IL Metropolitan Statistical Area.

The county government is composed of a Board of County Commissioners, which is the legislative branch, and an executive branch headed by the County Administrator. The County Board is composed of 15 members, each elected from a single-member district. The board is responsible for setting policy and enacting ordinances.

The county is also served by a number of other elected officials, including the Sheriff, State's Attorney, Coroner, and Circuit Clerk. The county also has a number of appointed officials, including the County Administrator, County Clerk, and Treasurer.

The county is divided into 24 townships, which provide local government services. The county also has a number of special districts, including the Peoria County Forest Preserve District, the Peoria County Health Department, and the Peoria County Regional Office of Education.

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