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Established: |
April 27, 1790 (Territorial Records of the Northwest
Territory, St. Clair Papers, Vol. 2, p. 165) |
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Origin of the name
of the county: |
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Named
for Arthur St. Clair, a soldier of the French and Indian wars, a
Major General during the Revolution, Commander-in-Chief of the Army
after the Revolution, and Governor of the Territory of the United
States northwest of the Ohio River. |
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Present area, or
parts of it, formerly included in: |
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St. Clair County was the first county established in Illinois, at
the time a part of the Northwest Territory. |
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County Seats: |
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1790–1814 |
Cahokia* |
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1790–1795 |
Kaskaskia* |
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1790–1795 |
Prairie du Rocher* |
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1814– |
Belleville |
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Arthur St. Clair established
three judicial districts with court sessions held in Cahokia,
Kaskaskia and Prairie du Rocher. With the formation of Randolph
County in 1795, Cahokia became the sole seat of government for St.
Clair County.
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Replica of the first courthouse in Illinois at
Cahokia in St. Clair County. |
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History of county
governing board: |
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1790–1806 |
Court of Quarter Sessions |
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1806–1809 |
Court of Common Pleas |
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1809–1811 |
County Court |
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1811–1814 |
Court of Common Pleas |
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1814–1818 |
County Court |
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1818–1819 |
Justices’ Court |
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1819–1849 |
County Commissioners’ Court |
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1849–1873 |
County Court |
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1873–1884 |
Board of County Commissioners |
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1884– |
County Board of Supervisors |
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Township
Government |
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Adopted: |
November 6, 1883 |
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Township Names: |
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Belleville |
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Canteen |
Formed from Centreville Station when it was subdivided into
Canteen and Centreville on March 5, 1910. |
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Caseyville |
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Centreville |
Formed from Centreville Station when it was subdivided into
Centreville and Canteen on March 5, 1910. |
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East St. Louis |
In February, 1888, East St. Louis was reorganized as two
townships: the township of the City of East St. Louis and Brooklyn (Stites)
which comprised the territory outside of the city. |
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Engelmann |
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Fayetteville |
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Freeburg |
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Lebanon |
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Lenzburg |
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Marissa |
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Mascoutah |
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Millstadt |
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New Athens |
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O’Fallon |
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Prairie du Long |
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Shiloh Valley |
Name changed from Shiloh (date unknown). |
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St. Clair |
Formed from Belleville on October 5, 1885. |
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Smithton |
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Stites |
Formed when East St. Louis township was reorganized in February,
1888: territory outside of the city of East St. Louis was designated
Brooklyn; this name was then changed to Stites in April, 1888. |
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Stookey |
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Sugarloaf |
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