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Illinois County Boundaries Maps from 1790-1859

Illinois Boundary Changes:
1673 - Illinois Became a County of Virginia [New France] French: Pays des Illinois
1778 - Illinois Country - Ceded by Virginia
1784 - Northwest Territory
1800 - Indiana Territory
1809 - Illinois Territory
1818 - Illinois Becomes the 21st state, with Kaskaskia as the Capital.

29 Individual Illinois Boundaries Maps 1790-1859


























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