| 2nd Illinois General Assembly | |
| Coa Pic: | Seal of Illinois.svg |
| Session Room: | VandaliaStateHouse VandaliaIL.jpg |
| House Type: | Bicameral |
| Houses: | SenateHouse of Representatives |
| Leader1 Type: | President of the Senate |
| Leader1: | Pierre Menard |
| Party1: | Independent |
| Leader2 Type: | Speaker of the House of Representatives |
| Leader2: | John McLean |
| Party2: | Independent |
| Members: | 14 Senators29 Representatives |
| Election: | 1818 |
| Meeting Place: | Vandalia, Illinois |
The 2nd Illinois General Assembly, consisting of the Illinois Senate and the Illinois House of Representatives, met from December 4, 1820, to February 15, 1821, during the second two years of Shadrach Bond's governorship, at The Vandalia State House.[1] The apportionment of seats in the House of Representatives was based on the provisions of the First Illinois Constitution.[2] Political parties were not established in the State at the time.
It was preceded by the 1st Illinois General Assembly. It was succeeded by the 3rd 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. Two counties shared one senator.