Class 2Class 2 U.S. senators belong to the electoral cycle that has recently been contested in 2002, 2008, 2014, and 2020. The next election will be in 2026.
|
C
|
Class 3Class 3 U.S. senators belong to the electoral cycle that has recently been contested in 2004, 2010, 2016, and 2022. The next election will be in 2028.
|
#
|
Senator
|
Party
|
Dates in office
|
Electoral history
|
T
|
T
|
Electoral history
|
Dates in office
|
Party
|
Senator
|
#
|
1
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/3/3d/JBThomas.jpg/100px-JBThomas.jpg) Jesse B. Thomas
|
Democratic- Republican
|
Dec 3, 1818 – Mar 3, 1829
|
Elected in 1818.
|
1
|
15th
|
1
|
Elected in 1818.
|
Dec 3, 1818 – Mar 3, 1824
|
Democratic- Republican
|
![]() Ninian Edwards
|
1
|
16th
|
2
|
Re-elected in 1819.Resigned.
|
17th
|
Re-elected in 1823.Retired.
|
2
|
18th
|
|
Mar 4, 1824 – Nov 24, 1824
|
Vacant
|
Elected to finish Edwards's term.Retired.
|
Nov 24, 1824 – Mar 3, 1825
|
Democratic- Republican
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/b/b0/JMcLean-Senator.jpg/100px-JMcLean-Senator.jpg) John McLean
|
2
|
National Republican
|
19th
|
3
|
Elected in 1825.
|
Mar 4, 1825 – Dec 12, 1835
|
Jacksonian
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/8/8e/EliasKane.jpg/100px-EliasKane.jpg) Elias Kane
|
3
|
20th
|
2
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/b/b0/JMcLean-Senator.jpg/100px-JMcLean-Senator.jpg) John McLean
|
Jacksonian
|
Mar 4, 1829 – Oct 14, 1830
|
Elected in 1829.Died.
|
3
|
21st
|
Vacant
|
Oct 14, 1830 – Nov 12, 1830
|
|
3
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/1/1a/DJ_Baker-Senator.jpg/100px-DJ_Baker-Senator.jpg) David J. Baker
|
Jacksonian
|
Nov 12, 1830 – Dec 11, 1830
|
Appointed to continue McLean's term.Retired.
|
4
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/b/b9/JMRobinson-Senator.jpg/100px-JMRobinson-Senator.jpg) John M. Robinson
|
Jacksonian
|
Dec 11, 1830 – Mar 3, 1841
|
Elected to finish McLean's term.
|
22nd
|
4
|
Re-elected in 1831.Died.
|
23rd
|
Re-elected in 1835.Retired.
|
4
|
24th
|
|
Dec 12, 1835 – Dec 30, 1835
|
Vacant
|
Appointed to finish Kane's term.Lost election to full term.
|
Dec 30, 1835 – Mar 3, 1837
|
Jacksonian
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/9/97/Governor_Ewing_Portrait_%28cropped%29.jpg/100px-Governor_Ewing_Portrait_%28cropped%29.jpg) William Lee D. Ewing
|
4
|
Democratic
|
25th
|
5
|
Elected in 1837.Retired.
|
Mar 4, 1837 – Mar 3, 1843
|
Democratic
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/e/ec/RYoung.jpg/100px-RYoung.jpg) Richard M. Young
|
5
|
26th
|
5
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/9/93/SMcRoberts-Senator.jpg/100px-SMcRoberts-Senator.jpg) Samuel McRoberts
|
Democratic
|
Mar 4, 1841 – Mar 27, 1843
|
Elected in 1841.Died.
|
5
|
27th
|
28th
|
6
|
Elected in 1843.Lost renomination.
|
Mar 4, 1843 – Mar 3, 1849
|
Democratic
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/c/c1/SBreese.jpg/100px-SBreese.jpg) Sidney Breese
|
6
|
Vacant
|
Mar 27, 1843 – Aug 16, 1843
|
|
6
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/f/f6/James_Semple.jpg/100px-James_Semple.jpg) James Semple
|
Democratic
|
Aug 16, 1843 – Mar 3, 1847
|
Appointed to continue McRoberts's term.Elected in 1844 to finish McRoberts's term.Retired.
|
29th
|
7
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/6/67/Senator_Stephen_A._Douglas_%28edited%29.png/100px-Senator_Stephen_A._Douglas_%28edited%29.png) Stephen A. Douglas
|
Democratic
|
Mar 4, 1847 – Jun 3, 1861
|
Elected in 1846.
|
6
|
30th
|
31st
|
7
|
Elected in 1849.[2]Election voided.[a]
|
Mar 4, 1849 – Mar 15, 1849
|
Democratic
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/8/8e/James_Shields_-_Brady-Handy.jpg/100px-James_Shields_-_Brady-Handy.jpg) James Shields
|
7
|
|
Mar 15, 1849 – Oct 27, 1849
|
Vacant
|
Elected to finish his own term.Lost re-election.
|
Oct 27, 1849 – Mar 3, 1855
|
Democratic
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/8/8e/James_Shields_-_Brady-Handy.jpg/100px-James_Shields_-_Brady-Handy.jpg) James Shields
|
32nd
|
Re-elected in 1852.
|
7
|
33rd
|
34th
|
8
|
Elected in 1855.
|
Mar 4, 1855 – Mar 3, 1873
|
Democratic
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/2/22/Lyman_Trumbull_-_Brady-Handy.jpg/100px-Lyman_Trumbull_-_Brady-Handy.jpg) Lyman Trumbull
|
8
|
35th
|
Republican
|
Re-elected in 1859.Died.
|
8
|
36th
|
37th
|
9
|
Re-elected in 1861.
|
Vacant
|
Jun 3, 1861 – Jun 26, 1861
|
|
8
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/3/37/Orville_Hickman_Browning_-_Brady-Handy.jpg/100px-Orville_Hickman_Browning_-_Brady-Handy.jpg) Orville Browning
|
Republican
|
Jun 26, 1861 – Jan 12, 1863
|
Appointed to continue Douglas's term.Retired.
|
9
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/7/79/William_Alexander_Richardson_-_Brady-Handy.jpg/100px-William_Alexander_Richardson_-_Brady-Handy.jpg) William A. Richardson
|
Democratic
|
Jan 12, 1863 – Mar 3, 1865
|
Elected to finish Douglas's term.Retired.
|
38th
|
10
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Richard.Yates.1.jpg/100px-Richard.Yates.1.jpg) Richard Yates
|
Republican
|
Mar 4, 1865 – Mar 3, 1871
|
Elected in 1864 or 1865.Retired.
|
9
|
39th
|
40th
|
10
|
Re-elected in 1867.[data missing]
|
41st
|
11
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/1/1f/John_Alexander_Logan.jpg/100px-John_Alexander_Logan.jpg) John A. Logan
|
Republican
|
Mar 4, 1871 – Mar 3, 1877
|
Elected in 1870 or 1871.Lost re-election.
|
10
|
42nd
|
Liberal Republican
|
43rd
|
11
|
Elected in 1873.Retired.
|
Mar 4, 1873 – Mar 3, 1879
|
Republican
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/e/e3/Richard_James_Oglesby.jpg/100px-Richard_James_Oglesby.jpg) Richard J. Oglesby
|
9
|
44th
|
12
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/d/de/DDavis.jpg/100px-DDavis.jpg) David Davis
|
Independent
|
Mar 4, 1877 – Mar 3, 1883
|
Elected in 1877.Retired.
|
11
|
45th
|
46th
|
12
|
Elected in 1879.
|
Mar 4, 1879 – Mar 3, 1885
|
Republican
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/1/1f/John_Alexander_Logan.jpg/100px-John_Alexander_Logan.jpg) John A. Logan
|
10
|
47th
|
13
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/6/60/Shelby_Moore_Cullom_-_Brady-Handy.jpg/100px-Shelby_Moore_Cullom_-_Brady-Handy.jpg) Shelby M. Cullom
|
Republican
|
Mar 4, 1883 – Mar 3, 1913
|
Elected in 1882.
|
12
|
48th
|
49th
|
13
|
Legislature failed to elect.
|
Mar 4, 1885 – May 18, 1885
|
Vacant
|
Re-elected late in 1885.Died.
|
May 19, 1885 – Dec 26, 1886
|
Republican
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/1/1f/John_Alexander_Logan.jpg/100px-John_Alexander_Logan.jpg) John A. Logan
|
|
Dec 26, 1886 – Jan 19, 1887
|
Vacant
|
Elected to finish Logan's term.Retired.
|
Jan 19, 1887 – Mar 3, 1891
|
Republican
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/3/3d/C.B.Farwell.jpg/100px-C.B.Farwell.jpg) Charles Farwell
|
11
|
50th
|
Re-elected in 1888.
|
13
|
51st
|
52nd
|
14
|
Elected in 1890.Retired.
|
Mar 4, 1891 – Mar 3, 1897
|
Democratic
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/d/df/John.M.Palmer.jpg/100px-John.M.Palmer.jpg) John Palmer
|
12
|
53rd
|
Re-elected in 1894.
|
14
|
54th
|
55th
|
15
|
Elected in 1897.[3]Retired.
|
Mar 4, 1897 – Mar 3, 1903
|
Republican
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/4/44/William_E._Mason.jpg/100px-William_E._Mason.jpg) William Mason
|
13
|
56th
|
Re-elected in 1901.
|
15
|
57th
|
58th
|
16
|
Elected in 1903.Lost re-election.
|
Mar 4, 1903 – Mar 3, 1909
|
Republican
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/7/70/AHopkins.jpg/100px-AHopkins.jpg) Albert Hopkins
|
14
|
59th
|
Re-elected in 1907.[4]Lost renomination.
|
16
|
60th
|
61st
|
17
|
|
Mar 4, 1909 – Jun 18, 1909
|
Vacant
|
Elected in 1909, but ineligible until resignation from U.S. House.Election voided.
|
Jun 18, 1909 – Jul 13, 1912
|
Republican
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/b/b4/William_Lorimer%2C_Illinois_Senator%2C_GGB_photo.jpg/100px-William_Lorimer%2C_Illinois_Senator%2C_GGB_photo.jpg) William Lorimer
|
15
|
62nd
|
|
Jul 13, 1912 – Mar 26, 1913
|
Vacant
|
Vacant
|
Mar 4, 1913 – Mar 26, 1913
|
Legislature elected late.
|
17
|
63rd
|
14
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/7/75/J._Hamilton_Lewis_%28Illinois_Blue_Book_Portrait_1913-1914%29.png/100px-J._Hamilton_Lewis_%28Illinois_Blue_Book_Portrait_1913-1914%29.png) J. Hamilton Lewis
|
Democratic
|
Mar 26, 1913 – Mar 3, 1919
|
Elected late in 1913.Lost re-election.
|
Elected in 1913 to finish Lorimer's term.
|
Mar 26, 1913 – Mar 3, 1921
|
Republican
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Lawrence_Yates_Sherman.jpg/100px-Lawrence_Yates_Sherman.jpg) Lawrence Y. Sherman
|
16
|
64th
|
18
|
Re-elected in 1914.Retired.
|
65th
|
15
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/5/51/Joseph_Medill_McCormick.jpg/100px-Joseph_Medill_McCormick.jpg) Medill McCormick
|
Republican
|
Mar 4, 1919 – Feb 25, 1925
|
Elected in 1918.Lost renomination and died just before the end of the term.
|
18
|
66th
|
67th
|
19
|
Elected in 1920.Lost renomination and died just before the end of the term.
|
Mar 4, 1921 – Dec 7, 1926
|
Republican
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/William_Brown_McKinley.jpg/100px-William_Brown_McKinley.jpg) William B. McKinley
|
17
|
68th
|
16
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/b/b9/Senator-elect_Chas._S._Deneen_of_Ill._at_desk%2C_%282-3-25%29_LCCN2016839252_%281%29.jpg/100px-Senator-elect_Chas._S._Deneen_of_Ill._at_desk%2C_%282-3-25%29_LCCN2016839252_%281%29.jpg) Charles S. Deneen
|
Republican
|
Feb 26, 1925 – Mar 3, 1931
|
Appointed to finish McCormick's term, having already been elected to the next term.
|
Elected in 1924.Lost renomination.
|
19
|
69th
|
Appointed to continue McKinley's term.Not seated/resigned.[b]
|
Dec 7, 1926
|
Republican
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/0/0e/Frank_L._Smith.jpg/100px-Frank_L._Smith.jpg) Frank L. Smith
|
18
|
|
Dec 7, 1926 – Dec 3, 1928
|
Vacant
|
70th
|
20
|
Elected to finish the term.Lost re-election.
|
Dec 3, 1928 – Mar 3, 1933
|
Republican
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Otis_Ferguson_Glenn.jpg/100px-Otis_Ferguson_Glenn.jpg) Otis F. Glenn
|
19
|
71st
|
17
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/4/41/J._Hamilton_Lewis_%28Illinois_Blue_Book_Portrait_1931-1932%29.png/100px-J._Hamilton_Lewis_%28Illinois_Blue_Book_Portrait_1931-1932%29.png) J. Hamilton Lewis
|
Democratic
|
Mar 4, 1931 – Apr 9, 1939
|
Elected in 1930.
|
20
|
72nd
|
73rd
|
21
|
Elected in 1932.Retired.
|
Mar 4, 1933 – Jan 3, 1939
|
Democratic
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/9/9d/William_H._Dieterich_%28Illinois_Blue_Book_Portrait_1933-1934%29.png/100px-William_H._Dieterich_%28Illinois_Blue_Book_Portrait_1933-1934%29.png) William H. Dieterich
|
20
|
74th
|
Re-elected in 1936.Died.
|
21
|
75th
|
76th
|
22
|
Elected in 1938.
|
Jan 3, 1939 – Jan 3, 1951
|
Democratic
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/8/8e/ScottWikeLucas.jpg/100px-ScottWikeLucas.jpg) Scott W. Lucas
|
21
|
Vacant
|
Apr 9, 1939 – Apr 14, 1939
|
|
18
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/f/f7/James_M._Slattery_%28Illinois_Blue_Book_Portrait_1939-1940%29.png/100px-James_M._Slattery_%28Illinois_Blue_Book_Portrait_1939-1940%29.png) James M. Slattery
|
Democratic
|
Apr 14, 1939 – Nov 21, 1940
|
Appointed to continue Lewis's term.Lost election to finish Lewis's term.
|
19
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Charles_W._Brooks_%28Illinois_Blue_Book_Portrait_1941-1942%29.png/100px-Charles_W._Brooks_%28Illinois_Blue_Book_Portrait_1941-1942%29.png) C. Wayland Brooks
|
Republican
|
Nov 22, 1940 – Jan 3, 1949
|
Elected to finish Lewis's term.
|
77th
|
Re-elected in 1942.Lost re-election.
|
22
|
78th
|
79th
|
23
|
Re-elected in 1944.Lost re-election.
|
80th
|
20
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Paul_Douglas_1959_Alt_Crop.jpg/100px-Paul_Douglas_1959_Alt_Crop.jpg) Paul Douglas
|
Democratic
|
Jan 3, 1949 – Jan 3, 1967
|
Elected in 1948.
|
23
|
81st
|
82nd
|
24
|
Elected in 1950.
|
Jan 3, 1951 – Sep 7, 1969
|
Republican
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/c/c2/EverettDirksen.jpg/100px-EverettDirksen.jpg) Everett Dirksen
|
22
|
83rd
|
Re-elected in 1954.
|
24
|
84th
|
85th
|
25
|
Re-elected in 1956.
|
86th
|
Re-elected in 1960.Lost re-election.
|
25
|
87th
|
88th
|
26
|
Re-elected in 1962.
|
89th
|
21
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/b/b1/Sen._Charles_Percy_%283x4%29.jpg/100px-Sen._Charles_Percy_%283x4%29.jpg) Charles H. Percy
|
Republican
|
Jan 3, 1967 – Jan 3, 1985
|
Elected in 1966.
|
26
|
90th
|
91st
|
27
|
Re-elected in 1968.Died.
|
|
Sep 7, 1969 – Sep 17, 1969
|
Vacant
|
Appointed to continue Dirksen's term.Lost election to finish Dirksen's term.
|
Sep 17, 1969 – Nov 3, 1970
|
Republican
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/d/d9/Ralph_T._Smith.jpg/100px-Ralph_T._Smith.jpg) Ralph T. Smith
|
23
|
|
Nov 3, 1970 – Nov 17, 1970
|
Vacant
|
Elected to finish Dirksen's term.
|
Nov 17, 1970 – Jan 3, 1981
|
Democratic
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/a/ae/AdlaistevensonIII.jpg/100px-AdlaistevensonIII.jpg) Adlai Stevenson III
|
24
|
92nd
|
Re-elected in 1972.
|
27
|
93rd
|
94th
|
28
|
Re-elected in 1974.Retired.
|
95th
|
Re-elected in 1978.Lost re-election.
|
28
|
96th
|
97th
|
29
|
Elected in 1980.
|
Jan 3, 1981 – Jan 3, 1993
|
Democratic
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Alan_Dixon_%28Illinois_Blue_Book_Portrait_1989-1990%29.jpg/100px-Alan_Dixon_%28Illinois_Blue_Book_Portrait_1989-1990%29.jpg) Alan J. Dixon
|
25
|
98th
|
22
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/a/ad/Sen._Paul_Simon.jpg/100px-Sen._Paul_Simon.jpg) Paul Simon
|
Democratic
|
Jan 3, 1985 – Jan 3, 1997
|
Elected in 1984.
|
29
|
99th
|
100th
|
30
|
Re-elected in 1986.Lost renomination.
|
101st
|
Re-elected in 1990.Retired.
|
30
|
102nd
|
103rd
|
31
|
Elected in 1992.Lost re-election.
|
Jan 3, 1993 – Jan 3, 1999
|
Democratic
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Sen._Carol_Moseley_Braun.jpg/100px-Sen._Carol_Moseley_Braun.jpg) Carol Moseley Braun
|
26
|
104th
|
23
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/4/49/Dick_Durbin_117th_Congress_portrait_%281%29_%28cropped%29.jpeg/100px-Dick_Durbin_117th_Congress_portrait_%281%29_%28cropped%29.jpeg) Dick Durbin
|
Democratic
|
Jan 3, 1997 – present
|
Elected in 1996.
|
31
|
105th
|
106th
|
32
|
Elected in 1998.Retired.
|
Jan 3, 1999 – Jan 3, 2005
|
Republican
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/b/b2/Peter_Fitzgerald.jpg/100px-Peter_Fitzgerald.jpg) Peter Fitzgerald
|
27
|
107th
|
Re-elected in 2002.
|
32
|
108th
|
109th
|
33
|
Elected in 2004.Resigned to become U.S. President.
|
Jan 3, 2005 – Nov 16, 2008
|
Democratic
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/f/f1/BarackObamaportrait.jpg/100px-BarackObamaportrait.jpg) Barack Obama
|
28
|
110th
|
|
Nov 16, 2008 – Jan 12, 2009
|
Vacant
|
Re-elected in 2008.
|
33
|
111th
|
Appointed to continue Obama's term, certified late.Retired when successor qualified.
|
Jan 12, 2009– Nov 29, 2010
|
Democratic
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/6/6e/Sen_Roland_Burris.jpg/100px-Sen_Roland_Burris.jpg) Roland Burris
|
29
|
Elected to finish Obama's term.[c]
|
Nov 29, 2010 – Jan 3, 2017
|
Republican
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/8/8c/Senator_Mark_Kirk_official_portrait_crop.jpg/100px-Senator_Mark_Kirk_official_portrait_crop.jpg) Mark Kirk
|
30
|
112th
|
34
|
Elected to full term in 2010.[c]Lost re-election.
|
113th
|
Re-elected in 2014.
|
34
|
114th
|
115th
|
35
|
Elected in 2016.
|
Jan 3, 2017 – present
|
Democratic
|
![](//upload.wikimedia.org/wikipedia/commons/thumb/0/04/Tammy_Duckworth%2C_official_portrait%2C_115th_Congress_%28cropped%29.jpg/100px-Tammy_Duckworth%2C_official_portrait%2C_115th_Congress_%28cropped%29.jpg) Tammy Duckworth
|
31
|
116th
|
Re-elected in 2020.
|
35
|
117th
|
118th
|
36
|
Re-elected in 2022.
|
119th
|
To be determined in the 2026 election.
|
36
|
120th
|
121st
|
37
|
To be determined in the 2028 election.
|
#
|
Senator
|
Party
|
Years in office
|
Electoral history
|
T
|
C
|
T
|
Electoral history
|
Years in office
|
Party
|
Senator
|
#
|
Class 2
|
Class 3
|