The 11th Illinois General Assembly, consisting of the Illinois Senate and the Illinois House of Representatives, met from December 3, 1838, to March 4, 1839 (1st session) and from December 9, 1839, to February 3, 1840 (2nd session).
The 11th General Assembly was preceded by the 10th Illinois General Assembly, and was succeeded by the 12th Illinois General Assembly.
On January 14, 1836, during the 9th Illinois General Assembly, the ratio of population per Senate seat was fixed at 7,000, and for Representatives at 3,000 resulting in a Senate of forty members and a House of ninety-one members.Moses, p. 1155 This arrangement lasted until January 14, 1841, when a new apportionment was made.
Senate Seats in DistrictCounties in District ImageSenatorRemarks1Alexander · Union 1Johnson · Pope 1Gallatin1 Hamilton · Jefferson 1 Franklin · Jackson 1Washington · Perry 1White 1 Edwards · Wayne · Wabash1 Lawrence · Crawford · Jasper1Edgar1Coles · Clark1Vermillion · Champaign1Madison1St. Clair1 Monroe · Madison · St. Clair This jurisdiction is in addition to the individual senators representing Madison and St. Clair counties.1Randolph1Clinton · Marion1 Bond · Montgomery1Fayette · Effingham · Clay1Shelby1Greene Resigned Replaced Turney after winning a special election held November 25, 18391Calhoun · GreeneThis jurisdiction is in addition to the individual senator representing Greene county.1Macoupin3Morgan Resigned Replaced O'Rear 2Sangamon 1Tazewell1McLean · Macon1Adams1Pike1Schuyler1Fulton Resigned Replaced Hackleton1McDonough · Hancock1Warren · Knox · Henry1Cook Resigned 1LaSalle · Iroquois1Putnam · Peoria1Jo Daviess · Mercer · Rock Island
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