Seven Illinois counties vote to explore splitting from Cook County
Article IV of the Constitution requires consent of the affected state legislatures and Congress to form a new state or alter boundaries; no county or group of counties holds unilateral authority.
Article IV of the Constitution requires consent of the affected state legislatures and Congress to form a new state or alter boundaries; no county or group of counties holds unilateral authority.
Seven Illinois counties approved non-binding referendums for the November ballot to explore forming a new state separate from Cook County.
Why it matters: A successful effort would shift which state sets tax rates, gun laws, abortion policy, and legislative representation for households in the affected counties and alter congressional apportionment.
Date to watch: November 3, 2026 general election for the seven advisory referendums; Indiana-Illinois boundary commission continues work into 2027.
Sources:
- U.S. Constitution (1787-09-17)
https://www.archives.gov/founding-docs/constitution-transcript - Texas v. White, 74 U.S. 700 (1869-04-12)
https://supreme.justia.com/cases/federal/us/74/700/ - Jacobson v. Massachusetts, 197 U.S. 11 (1905-02-20)
https://www.law.cornell.edu/supremecourt/text/197/11 - James Madison to Daniel Webster, March 15, 1833 (1833-03-15)
https://rotunda.upress.virginia.edu/founders/default.xqy?keys=FOEA-print-02-02-02-2705 - Declaration of Independence (1776-07-04)
https://www.archives.gov/founding-docs/declaration-transcript - NBC Chicago on Illinois county referendums (2026-07-06)
https://www.nbcchicago.com/news/local/chicago-politics/illinois-separation-movement-continues-with-7-more-counties-set-to-vote/3958136/
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