Madison County, Illinois

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

Madison County, Illinois Media

• Townships.Madison.Co.map.png

  Map of Madison County, Illinois

• Madison County Illinois 1812.png

  Madison County between its creation in 1812 and 1815, extending north to Lake Superior and the border with Rupert's Land

• Madison County Illinois 1815.png

  Madison County between 1815 and 1817

• Madison County Illinois 1817.png

  Madison County between 1817 and 1821

• Madison County Illinois 1821.png

  Madison County between 1821 and 1825

• Madison County Illinois 1825.png

  Between 1825 and 1829, Madison included a northern salient that was split off to form part of Macoupin County.

• Madison County Illinois 1829.png

  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.