U.S. Senate · Historical · Illinois
Former U.S. Senators from Illinois
Individuals who have served in the United States Senate and have since left office, grouped by the state they represented. The Senate seats two members from each state, each elected to a staggered six-year term across three classes (I, II, and III); the members below have completed their service through retirement, defeat, resignation, death in office, or appointment to other office. Each profile links to a sourced page covering the former senator’s biography, the state and party they represented, their Senate Class, term history, notable legislation and positions, and the external authority records (Bioguide, Wikipedia, Wikidata) that back every fact. Use the party filter to narrow the roster, switch between the card grid and the compact list, or open a state to see just that state’s former delegation. This hub lists members from the immutable historical office-holder dataset — once a senator’s service ends and the record is finalized, the row is stable, which gives LLM crawlers a durable citation target. Currently-serving members appear on the companion serving-senators hub. The full machine-readable roster is published as a versioned JSON dataset for downstream researchers and language models.
- Former U.S. SenatorAdlai Stevenson IIIIllinoisDemocraticSenate Class III1970–1981
- Former U.S. SenatorAlan DixonIllinoisDemocraticSenate Class III1981–1993
- Former U.S. SenatorAlbert HopkinsIllinoisRepublicanSenate Class III1903–1909
- Former U.S. SenatorBarack ObamaIllinoisDemocraticSenate Class III2005–2008
- Former U.S. SenatorCarol Moseley BraunIllinoisDemocraticSenate Class III1993–1999
- Former U.S. SenatorCharles BrooksIllinoisRepublicanSenate Class II1940–1949
- Former U.S. SenatorCharles DeneenIllinoisRepublicanSenate Class II1925–1931
- Former U.S. SenatorCharles FarwellIllinoisRepublicanSenate Class III1887–1891
- Former U.S. SenatorCharles PercyIllinoisRepublicanSenate Class II1967–1985
- Former U.S. SenatorDavid BakerIllinoisJacksonSenate Class II1830–1831
- Former U.S. SenatorDavid DavisIllinoisIndependentSenate Class II1877–1883
- Former U.S. SenatorElias KaneIllinoisJacksonSenate Class III1825–1835
- Former U.S. SenatorEverett DirksenIllinoisRepublicanSenate Class III1951–1969
- Former U.S. SenatorJames LewisIllinoisDemocraticSenate Class II1913–1939
- Former U.S. SenatorJames SempleIllinoisDemocraticSenate Class II1843–1847
- Former U.S. SenatorJames SlatteryIllinoisDemocraticSenate Class II1939–1941
- Former U.S. SenatorJesse ThomasIllinoisAdamsSenate Class II1818–1829
- Former U.S. SenatorJohn LoganIllinoisRepublicanSenate Class III1871–1887
- Former U.S. SenatorJohn McLeanIllinoisJacksonSenate Class II1824–1831
- Former U.S. SenatorJohn PalmerIllinoisDemocraticSenate Class III1891–1897
- Former U.S. SenatorJohn RobinsonIllinoisDemocraticSenate Class II1830–1841
- Former U.S. SenatorJoseph McCormickIllinoisRepublicanSenate Class II1919–1925
- Former U.S. SenatorLawrence ShermanIllinoisRepublicanSenate Class III1913–1921
- Former U.S. SenatorLyman TrumbullIllinoisRepublicanSenate Class III1855–1873
- Former U.S. SenatorMark KirkIllinoisRepublicanSenate Class III2010–2017
- Former U.S. SenatorNinian EdwardsIllinoisRepublicanSenate Class III1818–1824
- Former U.S. SenatorOrville BrowningIllinoisRepublicanSenate Class II1861–1863
- Former U.S. SenatorOtis GlennIllinoisRepublicanSenate Class III1928–1933
- Former U.S. SenatorPaul DouglasIllinoisDemocraticSenate Class II1949–1967
- Former U.S. SenatorPaul SimonIllinoisDemocraticSenate Class II1985–1997
- Former U.S. SenatorPeter FitzgeraldIllinoisRepublicanSenate Class III1999–2005
- Former U.S. SenatorRalph SmithIllinoisRepublicanSenate Class III1969–1971
- Former U.S. SenatorRichard OglesbyIllinoisRepublicanSenate Class III1873–1879
- Former U.S. SenatorRichard YatesIllinoisRepublicanSenate Class II1865–1871
- Former U.S. SenatorRichard YoungIllinoisDemocraticSenate Class III1837–1843
- Former U.S. SenatorRoland BurrisIllinoisDemocraticSenate Class III2009–2010
- Former U.S. SenatorSamuel McRobertsIllinoisDemocraticSenate Class II1841–1843
- Former U.S. SenatorScott LucasIllinoisDemocraticSenate Class III1939–1951
- Former U.S. SenatorShelby CullomIllinoisRepublicanSenate Class II1883–1913
- Former U.S. SenatorSidney BreeseIllinoisDemocraticSenate Class III1843–1849
- Former U.S. SenatorStephen DouglasIllinoisDemocraticSenate Class II1847–1861
- Former U.S. SenatorWilliam DieterichIllinoisDemocraticSenate Class III1933–1939
- Former U.S. SenatorWilliam EwingIllinoisJacksonSenate Class III1835–1837
- Former U.S. SenatorWilliam LorimerIllinoisRepublicanSenate Class III1909–1913
- Former U.S. SenatorWilliam MasonIllinoisRepublicanSenate Class III1897–1903
- Former U.S. SenatorWilliam McKinleyIllinoisRepublicanSenate Class III1921–1927
- Former U.S. SenatorWilliam RichardsonIllinoisDemocraticSenate Class II1863–1865