Illinois's 18th congressional district

The 18th congressional district of Illinois covered central and western Illinois, including all of Jacksonville and Quincy and parts of Bloomington, Peoria, and Springfield. It covered much of the territory represented by Abraham Lincoln during his single term in the House.

It was last represented by Republican Darin LaHood.

After the 2020 U.S. census, the 18th district was eliminated ahead of the 2022 elections.

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