Mason County is located in the central part of Illinois and is part of the Peoria, IL Metropolitan Statistical Area. The county seat is Havana.

Mason County is governed by a seven-member Board of Commissioners. The board is elected from seven districts within the county. The board is responsible for setting policy and overseeing the county's budget.

The county is served by the Mason County Sheriff's Office, which is responsible for law enforcement and corrections. The county also has a Circuit Court, which is responsible for civil and criminal cases.

Mason County is home to several state parks, including the Mason County State Fish and Wildlife Area, the Mason County State Forest, and the Mason County State Recreation Area. The county also has several local parks, including the Mason County Park and the Mason County Nature Preserve.

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