Madison County, Illinois

Madison County is a county in the U.S. state of Illinois. In the 2020 census, 265,859 people lived there.^[1] Its county seat is Edwardsville and largest city is Granite City.

Madison County, Illinois Media

Map of Madison County, Illinois
Madison County between its creation in 1812 and 1815, extending north to Lake Superior and the border with Rupert's Land
Madison County between 1815 and 1817
Madison County between 1817 and 1821
Madison County between 1821 and 1825
Between 1825 and 1829, Madison included a northern salient that was split off to form part of Macoupin County.
In 1829, Madison returned to its 1821 borders.
Madison County Illinois 1843.png

In 1843, a small amount of land was transferred to Bond County, reducing Madison to its current size.

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