St. Clair County ILGenWeb is a free genealogical site about the history of the county.
It is a member of ILGenWeb,
which is a member of USGenWeb®.
We hope you find helpful clues for your research of St. Clair county ancestors.
This site is dedicated to
Jim Bridges and Diane Walsh
for their years of service to St. Clair County ILGenWeb
Are you a return visitor? See our What's New log for the latest updates, changes, and additions.
Are you familiar with the area? Do you have a family tree connection to the area? Please consider contributing your pieces of St. Clair County family history. Corrections, updates, and additions to this site are always welcome. Volunteers are always needed!
County Coordinator: Norma Hass normahass01@gmail.com
St. Clair County was created in 1790, from the western half of Knox County, when it was a part of the Northwest Territory. It was named in honor of General Arthur St. Clair, who was the first Governor and Commander in-Chief over this territory.
The boundaries changed often. In 1795, St. Clair lost its southern portion to the creation of Randolph County. In 1801 St. Clair County gained a bit of territory from Knox County. In 1803 the border shifted between St. Clair and Randolph. In 1809, the county became the administrative center of the Illinois Territory. In 1812, St. Clair lost its northern portion to the creation of Madison County. In 1813, it regained eastern land from Randolph. In 1816, a southwestern portion was lost to the creation of Monroe County. In 1818, when Illinois became a state, the eastern part of St. Clair County was lost to the creation of Washington County. Again, in 1825 and 1827, St. Clair lost a bit to Monroe. The boundaries have remained stable since then.
The County Seat is Belleville.
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MOGenWeb Monroe |
Madison | Clinton Wash- ington |
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