Illinois's 13th congressional district is located in the central part of the state. It includes parts of several counties, such as Champaign, Macon, and Montgomery. The district encompasses both urban and rural areas, providing a diverse demographic and economic landscape. The district has been represented by various politicians over the years, with the current representative being Nikki Budzinski, a member of the Democratic Party. The district's boundaries have changed multiple times due to redistricting, reflecting shifts in population and political trends within Illinois.