The 15th Illinois General Assembly, consisting of the Illinois Senate and the Illinois House of Representatives, met from December 7, 1846, to March 1, 1847.
The 15th General Assembly was preceded by the 14th Illinois General Assembly, and was succeeded by the 16th Illinois General Assembly.
Senate
House Seats in DistrictCounties representedImageRepresentativeRemarks1Lake 3Cook4DuPage · Will · Iroquoisoften listed as Captain Elijah Kinne3 Kane · Boone · DeKalb · McHenry · Kendall (part) 3Grundy · LaSalle · Kendall (part)1Peoria1Peoria · Stark · Bureau1Stark · Bureau2Tazewell1Marshall · Putnam1Stephenson · Carroll1Jo Daviess 1Rock Island · Henry1Whiteside · Lee1Winnebago1Ogle1Schuyler1Brown 1 Brown · Schuyler5Adams · MarquetteMarquette County, formed from part of Adams County, was allocated 2 seats subsequent to the apportionment of January 14, 1841. As the county was never duly organized, the seats were returned to Adams County after the general election2Hancock1McDonough2Warren · Henderson1Knox1Knox · Mercer 3Fulton1Fulton · Peoria4Sangamon1Menard1Logan · Mason1McLean1McLean · Livingston1DeWitt1Piatt · Macon4Morgan3Pike1Cass2Scott2Macoupin1Jersey2Greene 1Greene · Calhoun 3Madison3St. Clair3Monroe · Randolph1Bond1Montgomery1Christian2Fayette · Effingham1Clay1Shelby1White1Wabash1Wayne1Edwards2Lawrence2Crawford · Jasper2Clark3Coles1Edgar2Vermilion1Champaign2Union · Alexander 1Pope · Hardin†Died in officeReplaced Rhodes1Johnson · Massac1Williamson1Jackson1FranklinResignedReplaced Denning3Gallatin 1Hamilton1Hamilton · Jefferson · Marion 1Jefferson1Marion1Perry2Clinton · Washington
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