The 13th Illinois General Assembly, consisting of the Illinois Senate and the Illinois House of Representatives, met from December 5, 1842, to March 6, 1843 (1st session).
The 13th General Assembly was preceded by the 12th Illinois General Assembly, and was succeeded by the 14th Illinois General Assembly.
On January 14, 1841, during the 12th Illinois General Assembly, the ratio of population per Senate seat was fixed at 12,000, and for Representatives at 4,000 resulting in a Senate of forty-one members and a House of one hundred twenty-one members.Moses, p. 1155 This arrangement lasted until February 25, 1847, when a new apportionment was made.
Senate
The reapportionment of the Senate created problems as it made no accounting for the sixteen senators whose terms did not expire creating a number of disputes. Holdover senators combined with newly elected senators led to 4 senators in districts where the new apportionment had only allocated 3 senators (Madison, St. Clair, Monroe, and Randolph counties). As the situation was deemed too difficult to solve and was not challenged, the Senate retained all 4 senators and the Senate had 42 members for the length of the term.
Seats in DistrictCounties representedImageSenatorRemarks1Sangamon Disputed. Baker was the holdover senator with two years remaining on his term. His district had been reduced from 4 counties (Sangamon, Menard, Logan, and Christian) to just Sangamon. Harrison won election as Senator in the new district. The issue was referred to the Select Committee for resolution and it was decided that it would be unfair to have two senators representing Sangamon county and Harrison was excluded. No one contested the decision. 1McLean · Livingston · DeWitt· Piatt · Macon1Rock Island · Henry · Whiteside · Lee1St. Clair1Greene · CalhounDisputed. English ultimately resigned.1Perry · Clinton · Washington1Tazewell · Marshall · Putnam1White1Hancock1Union · Alexander1Fayette · Effingham · Clay1Vermilion · Champaign1Scott · CassDisputed1Macoupin · Jersey1Jo Daviess · Stephenson · Carroll1Morgan1Cook · Lake Disputed1Crawford · Lawrence · Jasper1 Monroe · Randolph ★Disputed ★ Both senators were retained effectively allocating the district 2 senators1 Bond · Montgomery · Christian1 Gallatin1Fulton · Peoria1Will · DuPage · Iroquois1 Knox · Mercer1Kane · McHenry · Boone · DeKalb1Edgar1Clark · Coles1Jackson · Williamson · Franklin1Adams Resigned1Ogle · Winnebago1LaSalle1Wayne · Wabash · Edwards1Madison1Warren · McDonough · Henderson1Peoria · Stark · Bureau1Brown · Schuyler1Shelby1Pope · Hardin · Johnson1Jefferson County · Hamilton · Marion1Pike1Menard · Logan · Mason
House Seats in DistrictCounties representedImageRepresentativeRemarks1Lake 3Cook1Iroquois1DuPage2Will3 Chosen from the counties where their elected Senator, Ira Minard, does not resideKane · McHenry · Boone · DeKalb3LaSalle1Peoria1Stark · Bureau2Tazewell1Marshall · Putnam1Stephenson · Carroll1Jo Daviess One of two "John McDonald's" serving in the House1Rock Island · Henry1Whiteside · Lee1Winnebago1Ogle1Schuyler1Brown 1 Brown · Schuyler5Adams2Hancock1McDonough2Warren · Henderson1Knox1Knox · Mercer3Fulton1Fulton · Peoria4Sangamon1Menard1Logan · Mason1McLean1McLean · Livingston1DeWitt1Piatt · Macon4Morgan3Pike1Cass2Scott2Macoupin1Jersey2Greene † Died February 3, 18431Greene · Calhoun One of two "John McDonald's" serving in the House3Madison3St. Clair3Monroe · Randolph1Bond1Montgomery1Christian2Fayette · Effingham1Clay1Shelby1White1Wabash1Wayne1Edwards2Lawrence2Crawford · Jasper2Clark3Coles1Edgar2Vermilion1Champaign2Union · Alexander 1Pope · Hardin1Johnson1Williamson1Jackson1Franklin3Gallatin 1Hamilton1Hamilton · Jefferson · Marion 1Jefferson1Marion1Perry2Clinton · Washington
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