The 3rd Illinois General Assembly, consisting of the Illinois Senate and the Illinois House of Representatives, met from December 2, 1822, to February 18, 1823, during the first two years of Edward Coles' governorship, at The Vandalia State House. The apportionment of seats in the House of Representatives was based on the provisions of the First Illinois Constitution. Political parties were not established in the State at the time.
The 3rd General Assembly was preceded by the 2nd Illinois General Assembly, and was succeeded by the 4th Illinois General Assembly.
This list is arranged by chamber, then by county. Senators and Representatives were both allotted to counties roughly by population and elected at-large within their districts. Greene and White counties shared one senator.
Bond County
Crawford County
Edwards County
Gallatin County
Greene County
Hamilton County'
Jackson County
Johnson County
Madison County
Monroe County
Pope County
Randolph County
'Sangamon County
St. Clair County
Union County
Washington County
'Wayne County
White County
Alexander County
Clark County
Fayette County, Illinois
Franklin County
Jefferson County
Lawrence County
Pike County
Wayne County