List of United States senators from Iowa

Iowa was admitted to the Union on December 28, 1846, and elects United States senators to Class 2 and Class 3. The state's current U.S. senators are Republicans Chuck Grassley (serving since 1981) and Joni Ernst (serving since 2015). Chuck Grassley is Iowa's longest-serving senator (since 1981).

Current delegation

List of senatorsEdit

Class 2

Class 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 3

Class 3 U.S. senators belong to the electoral cycle that has recently been contested in 1998, 2004, 2010, and 2016. The next election will be in 2022.

# Senator Party Dates in office Electoral history T T Electoral history Dates in office Party Senator #
Vacant December 28, 1846 –
December 7, 1848
Legislature failed to elect due to a three-way split that prevented any candidate from earning the required number of 30 legislators' votes.[1] 29th Legislature failed to elect due to a three-way split that prevented any candidate from earning the required number of 30 legislators' votes.[1] December 28, 1846 –
December 7, 1848
Vacant
30th
1  
George W. Jones
Democratic December 7, 1848 –
March 3, 1859
Elected in 1848. 1 1 Elected in 1848. December 7, 1848 –
February 22, 1855
Democratic  
Augustus C. Dodge
1
31st 2 Re-elected in 1849.

Resigned to become U.S. Minister to Spain, having lost re-election.
32nd
Re-elected in 1852.

Lost renomination.
2 33rd
  February 22, 1855 –
March 3, 1855
Vacant
34th 3 Elected in 1855.

Elected invalidated, as the Iowa Senate had not participated in it.
March 4, 1855 –
January 5, 1857
Free Soil  
James Harlan
2
  January 5, 1857 –
January 29, 1857
Vacant
Re-elected to finish his vacant term. January 29, 1857 –
May 15, 1865
Republican  
James Harlan
35th
2  
James W. Grimes
Republican March 4, 1859 –
December 6, 1869
Elected in 1858. 3 36th
37th 4 Re-elected in 1860.

Resigned to become U.S. Secretary of the Interior.
38th
Re-elected in 1864.

Resigned due to ill health.
4 39th
  May 15, 1865 –
January 13, 1866
Vacant
Elected to finish Harlan's term.[2]

Lost nomination for the next term.
January 13, 1866 –
March 3, 1867
Republican  
Samuel J. Kirkwood
3
40th 5 Elected January 13, 1866.[3]

Lost re-election.
March 4, 1867 –
March 3, 1873
Republican  
James Harlan
4
41st
Vacant December 6, 1869 –
January 18, 1870
 
3  
James B. Howell
Republican January 18, 1870 –
March 3, 1871
Elected to finish Grimes's term.

Retired.
4  
George G. Wright
Republican March 4, 1871 –
March 3, 1877
Elected in 1870.

Retired.
5 42nd
43rd 6 Elected January 17, 1872.[4] March 4, 1873 –
August 4, 1908
Republican  
William B. Allison
5
44th
5  
Samuel J. Kirkwood
Republican March 4, 1877 –
March 7, 1881
Elected in 1876 or 1877.

Resigned to become U.S. Secretary of the Interior.
6 45th
46th 7 Re-elected January 23, 1878.[5]
47th
6  
James W. McDill
Republican March 8, 1881 –
March 3, 1883
Appointed to continue Kirkwood's term.

Elected January 25, 1882, to finish Kirkwood's term.[6]

Retired.
7  
James F. Wilson
Republican March 4, 1883 –
March 3, 1895
Elected January 25, 1882.[7] 7 48th
49th 8 Re-elected January 23, 1884.[8]
50th
Re-elected in 1888.

Retired.
8 51st
52nd 9 Re-elected March 5, 1890.[9]
53rd
8  
John H. Gear
Republican March 4, 1895 –
July 14, 1900
Elected January 17, 1894.[10]

Re-elected January 17, 1900,[11] but died.
9 54th
55th 10 Re-elected January 22, 1896.[12]
56th
Vacant July 14, 1900 –
August 22, 1900
 
9  
Jonathan P. Dolliver
Republican August 22, 1900 –
October 15, 1910
Appointed to finish Gear's term.
Appointed to begin the vacant term.

Elected January 22, 1902, to finish the vacant term.[13]
10 57th
58th 11 Re-elected January 22, 1902.[14]

Renominated in 1908 but died before the general election.
59th
Re-elected January 23, 1907.

Died.
11 60th
  August 4, 1908 –
November 24, 1908
Vacant
Elected to finish Allison's term. November 24, 1908 –
July 30, 1926
Republican  
Albert B. Cummins
6
61st 12 Re-elected January 19, 1909.
Vacant October 15, 1910 –
November 12, 1910
 
10  
Lafayette Young
Republican November 12, 1910 –
April 11, 1911
Appointed to continue Dolliver's term.

Lost election to finish Dolliver's term.
62nd
11  
William S. Kenyon
Republican April 12, 1911 –
February 24, 1922
Elected to finish Dolliver's term.
Re-elected January 21, 1913. 12 63rd
64th 13 Re-elected in 1914.
65th
Re-elected in 1918.

Resigned to become Judge of the U.S. Court of Appeals.
13 66th
67th 14 Re-elected in 1920.

Lost renomination, then died.
12  
Charles A. Rawson
Republican February 24, 1922 –
December 1, 1922
Appointed to continue Kenyon's term.

Retired when his successor was elected.
13  
Smith W. Brookhart
Republican December 1, 1922 –
April 12, 1926
Elected to finish Kenyon's term.
68th
Re-elected in 1924.

Lost election challenge.
14 69th
14  
Daniel F. Steck
Democratic April 12, 1926 –
March 3, 1931
Successfully challenged his predecessor's election.

Lost re-election.
  July 30, 1926 –
August 7, 1926
Vacant
Appointed to continue Cummins's term.

Elected on November 10, 1926, to finish Cummins's term.[15]

Retired.
August 7, 1926 –
March 3, 1927
Republican  
David W. Stewart
7
70th 15 Elected in 1926.

Lost renomination and then lost re-election as an Independent.
March 4, 1927 –
March 3, 1933
Republican  
Smith W. Brookhart
8
71st
15  
Lester J. Dickinson
Republican March 4, 1931 –
January 3, 1937
Elected in 1930.

Lost re-election.
15 72nd
73rd 16 Elected in 1932.

Died.
March 4, 1933 –
July 16, 1936
Democratic  
Richard L. Murphy
9
74th
  July 16, 1936 –
November 3, 1936
Vacant
Elected to finish Murphy's term. November 3, 1936 –
January 3, 1945
Democratic  
Guy Gillette
10
16  
Clyde L. Herring
Democratic January 3, 1937 –
January 3, 1943
Elected in 1936.
Didn't take seat until January 15, 1937, as he wanted to remain Governor of Iowa. However, he was still elected and qualified as senator.

Lost re-election.
16 75th
76th 17 Re-elected in 1938.

Lost re-election.
77th
17  
George A. Wilson
Republican January 3, 1943 –
January 3, 1949
Elected in 1942.
Didn't take seat until January 14, 1943, as he wanted to remain Governor of Iowa. However, he was still elected and qualified as senator.

Lost re-election.
17 78th
79th 18 Elected in 1944. January 3, 1945 –
January 3, 1969
Republican  
Bourke B. Hickenlooper
11
80th
18  
Guy Gillette
Democratic January 3, 1949 –
January 3, 1955
Elected in 1948.

Lost re-election.
18 81st
82nd 19 Re-elected in 1950.
83rd
19  
Thomas E. Martin
Republican January 3, 1955 –
January 3, 1961
Elected in 1954.

Retired.
19 84th
85th 20 Re-elected in 1956.
86th
20  
Jack Miller
Republican January 3, 1961 –
January 3, 1973
Elected in 1960. 20 87th
88th 21 Re-elected in 1962

Retired.
89th
Re-elected in 1966.

Lost re-election.
21 90th
91st 22 Elected in 1968.

Retired.
January 3, 1969 –
January 3, 1975
Democratic  
Harold Hughes
12
92nd
21  
Dick Clark
Democratic January 3, 1973 –
January 3, 1979
Elected in 1972.

Lost re-election.
22 93rd
94th 23 Elected in 1974.

Lost re-election.
January 3, 1975 –
January 3, 1981
Democratic  
John Culver
13
95th
22  
Roger Jepsen
Republican January 3, 1979 –
January 3, 1985
Elected in 1978.

Lost re-election.
23 96th
97th 24 Elected in 1980. January 3, 1981 –
Present
Republican  
Chuck Grassley
14
98th
23  
Tom Harkin
Democratic January 3, 1985 –
January 3, 2015
Elected in 1984. 24 99th
100th 25 Re-elected in 1986.
101st
Re-elected in 1990. 25 102nd
103rd 26 Re-elected in 1992.
104th
Re-elected in 1996. 26 105th
106th 27 Re-elected in 1998.
107th
Re-elected in 2002. 27 108th
109th 28 Re-elected in 2004.
110th
Re-elected in 2008

Retired.
28 111th
112th 29 Re-elected in 2010.
113th
24  
Joni Ernst
Republican January 3, 2015 –
Present
Elected in 2014. 29 114th
115th 30 Re-elected in 2016.
116th
Re-elected in 2020. 30 117th
118th 31 To be decided in the 2022 election.
119th
To be determined in the 2026 election. 31 120th
# Senator Party Years in office Electoral history T   T Electoral history Years in office Party Senator #
Class 2 Class 3

Living former senatorsEdit

As of June 2022, there are two living former U.S. senators from Iowa. The most recent and most recently serving senator to die was Roger Jepsen (served 1979–1985) on November 13, 2020.

Senator Term of office Date of birth (and age)
Dick Clark 1973–1979 (1928-09-14) September 14, 1928 (age 93)
Tom Harkin 1985–2015 (1939-11-19) November 19, 1939 (age 82)

SuperlativesEdit

Longest serviceEdit

Senator First served Last served Length of service
Chuck Grassley January 3, 1981 Present 41 years, 175 days
(15,150 days)
William B. Allison March 4, 1873 August 4, 1908 35 years, 153 days
(12,936 days)
Tom Harkin January 3, 1985 January 3, 2015 30 years, 0 days
(10,957 days)
Bourke B. Hickenlooper January 3, 1945 January 3, 1969 24 years, 0 days
(8,766 days)
Albert B. Cummins November 24, 1908 July 30, 1926 17 years, 248 days
(6,457 days)

Shortest serviceEdit

Senator First served Last served Length of service
Lafayette Young November 12, 1910 April 11, 1911 4 months, 4 weeks and 2 days
(150 days)
David W. Stewart August 7, 1926 March 3, 1927 6 months, 3 weeks and 3 days
(208 days)
Charles A. Rawson February 24, 1922 November 7, 1922 8 months and 2 weeks
(256 days)
James B. Howell January 18, 1870 March 3, 1871 1 year, 1 month, 1 week and 6 days
(409 days)
James W. McDill March 8, 1881 March 3, 1883 1 year, 11 months, 3 weeks and 2 days
(725 days)

Youngest at beginning of serviceEdit

Senator Date of birth First served Age
James Harlan August 26, 1820 March 4, 1855 34 years, 6 months and 6 days
Augustus C. Dodge January 2, 1812 December 7, 1848 36 years, 11 months and 5 days
David W. Stewart January 22, 1887 August 7, 1926 39 years, 6 months and 16 days
William S. Kenyon June 10, 1869 April 12, 1911 41 years, 10 months and 2 days
James W. Grimes October 20, 1816 March 4, 1859 42 years, 4 months and 12 days

Oldest at end of serviceEdit

Senator Date of birth Last served Age
Chuck Grassley September 17, 1933 Present 88 years, 9 months and 10 days
William B. Allison March 2, 1829 August 4, 1908 79 years, 5 months and 2 days
Albert B. Cummins February 15, 1850 July 30, 1926 76 years, 5 months and 15 days
Guy Gillette February 3, 1879 January 3, 1955 75 years and 11 months
John H. Gear April 7, 1825 July 14, 1900 75 years, 3 months and 7 days

See alsoEdit

NotesEdit

  1. ^ a b Clark, pp. 17–46, 72–79.
  2. ^ Clark, p. 141: Kirkwood 118 votes, J. F. Stomenan (Democratic) 20
  3. ^ Clark, p. 141: Harlan 118 votes, H. H. Trimble (Democratic) 20
  4. ^ Clark, p. 167.
  5. ^ Clark, p. 185: Allison 104 votes, Daniel F. Miller 35 votes, E. N. Gates 3 votes.
  6. ^ Clark, p. 199: M. M. Ham and Daniel Campbell lost.
  7. ^ Clark, p. 199: L. G. Kinne and D. P. Stubbs lost.
  8. ^ Clark, p. 209: Allison 90 votes, Benton J. Hall 48 votes, D. M. Clark 10 votes, L. G. Kinne 1 vote.
  9. ^ Clark, p. 221: Allison 79 votes, S.T. Bestow (Democratic) 63 votes, William Larrabee 8 votes.
  10. ^ Clark, p. 234: Gear beat Democrat Horace Boies by votes unknown.
  11. ^ Clark, p. 245: Gear 111 votes, Fred E. White (Democratic) 32 votes.
  12. ^ Clark, p. 238: Allison 118 votes, Washington I. Babb (Democratic) 25 votes, Frank Q. Stuart 1 vote.
  13. ^ Clark, p. 247: Dolliver 119 votes, John J. Seerley (Democratic) 20 votes.
  14. ^ Clark, p. 247: Allison 119 votes, E. H. Thayer (Democratic) 20 votes.
  15. ^ Byrd, p. 107.

ReferencesEdit

  • Byrd, Robert C. (October 1, 1993). Wolff, Wendy (ed.). The Senate, 1789-1989: Historical Statistics, 1789-1992. United States Senate Historical Office (volume 4 Bicentennial ed.). Washington, D.C.: U.S. Government Printing Office. ISBN 9780160632563.
  • Clark, Dan Elbert (1913). "History of Senatorial Elections in Iowa". Iowa City, Iowa.