This district spans the lands of Cook, DuPage, Kane, Kendall, and Will Counties. Its borders embrace the cities of Aurora, Naperville, Joliet, Bolingbrook, and Romeoville.

The Eleventh is a realm of ever-changing frontiers. Through many great redrawings of the map, its borders have shifted with the movement of the people, joining cities and suburbs into a land where every election is hard-fought. Many industries prosper within its domain. Mighty factories, halls of healing, centers of technology, and vast networks of trade all strengthen the district's economy. At its heart stands Aurora, the second-largest city in Illinois and one of the district's greatest centers of commerce and population.

The struggle for the Eleventh has seen many champions. Republican Jerry Weller defended the district from 1995 until 2009. Democrat Debbie Halvorson claimed the seat for a single term before Republican Adam Kinzinger emerged victorious in 2010. Then came another great redrawing of the map. In 2012, Democrat Bill Foster—a physicist and businessman who had once represented the Fourteenth District—won the newly shaped Eleventh and has defended it in every contest since. As its champion, Foster has devoted his efforts to strengthening the economy, advancing scientific research, and improving healthcare.

The Eleventh bears a Cook Partisan Voting Index of D+5, making it a realm that leans slightly toward the Democratic faction. Its people come from many backgrounds, with White, Hispanic, Asian, and Black communities all calling the district home. The land is prosperous, with a median household income above the national average. Its citizens are known for their skill and learning, with many working in professional and technical trades. Together, these qualities have made the Eleventh one of Illinois' great centers of innovation and opportunity.