List of United States senators from Iowa

Current delegation

Chuck Grassley (R)

Joni Ernst (R)

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).

List of senators[]

#	Senator	Party	Dates in office	Electoral history	T	C	T	Electoral history	Dates in office	Party	Senator	#
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.
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
Vacant			December 28, 1846 – December 7, 1848		—	30th	—		December 28, 1846 – December 7, 1848	Vacant
1	George W. Jones	Democratic	December 7, 1848 – March 3, 1859	Elected in 1848.	1	30th	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
						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.		47th
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.
10	Lafayette Young	Republican	November 12, 1910 – April 11, 1911			62nd
11	William S. Kenyon	Republican	April 12, 1911 – February 24, 1922	Elected to finish Dolliver's term.		62nd
				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.
				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		Elected in 1932. Died.	March 4, 1933 – July 16, 1936	Democratic	Richard L. Murphy	9
									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		Elected to finish Murphy's term.
						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 U.S. senators[]

As of August 2021, 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 92)
Tom Harkin	1985–2015	(1939-11-19) November 19, 1939 (age 81)

Superlatives[]

Longest service[]

Senator	First served	Last served	Length of service
Chuck Grassley	January 3, 1981	Present	40 years, 237 days (14,847 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 service[]

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 service[]

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 service[]

Senator	Date of birth	Last served	Age
Chuck Grassley	September 17, 1933	Present	87 years, 11 months and 11 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

Notes[]

^ Jump up to: ^a ^b Clark, pp. 17–46, 72–79.
^ Clark, p. 141: Kirkwood 118 votes, (Democratic) 20
^ Clark, p. 141: Harlan 118 votes, (Democratic) 20
^ Clark, p. 167.
^ Clark, p. 185: Allison 104 votes, Daniel F. Miller 35 votes, 3 votes.
^ Clark, p. 199: and lost.
^ Clark, p. 199: and lost.
^ Clark, p. 209: Allison 90 votes, Benton J. Hall 48 votes, 10 votes, 1 vote.
^ Clark, p. 221: Allison 79 votes, (Democratic) 63 votes, William Larrabee 8 votes.
^ Clark, p. 234: Gear beat Democrat Horace Boies by votes unknown.
^ Clark, p. 245: Gear 111 votes, Fred E. White (Democratic) 32 votes.
^ Clark, p. 238: Allison 118 votes, (Democratic) 25 votes, 1 vote.
^ Clark, p. 247: Dolliver 119 votes, John J. Seerley (Democratic) 20 votes.
^ Clark, p. 247: Allison 119 votes, (Democratic) 20 votes.
^ Byrd, p. 107.

References[]

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.
Clark, Dan Elbert (1913). "History of Senatorial Elections in Iowa". Iowa City, Iowa.

[FOOTNOTEClark17–46,_72–79-1] Jump up to: ^a ^b Clark, pp. 17–46, 72–79.

[2] Clark, p. 141: Kirkwood 118 votes, (Democratic) 20

[3] Clark, p. 141: Harlan 118 votes, (Democratic) 20

[FOOTNOTEClark167-4] Clark, p. 167.

[5] Clark, p. 185: Allison 104 votes, Daniel F. Miller 35 votes, 3 votes.

[6] Clark, p. 199: and lost.

[7] Clark, p. 199: and lost.

[8] Clark, p. 209: Allison 90 votes, Benton J. Hall 48 votes, 10 votes, 1 vote.

[9] Clark, p. 221: Allison 79 votes, (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, (Democratic) 25 votes, 1 vote.

[13] Clark, p. 247: Dolliver 119 votes, John J. Seerley (Democratic) 20 votes.

[14] Clark, p. 247: Allison 119 votes, (Democratic) 20 votes.

[FOOTNOTEByrd107-15] Byrd, p. 107.

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show v t United States senators from Iowa
Class 2	Jones Grimes Howell Wright Kirkwood McDill J. Wilson Gear Dolliver Young Kenyon Rawson Brookhart Steck Dickinson Herring G. Wilson Gillette Martin Miller Clark Jepsen Harkin Ernst
Class 3	Dodge Harlan Kirkwood Harlan Allison Cummins Stewart Brookhart Murphy Gillette Hickenlooper Hughes Culver Grassley

show v t Lists of United States congressional delegations
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Others	American Samoa Cherokee Nation District of Columbia Guam Northern Mariana Islands Puerto Rico U.S. Virgin Islands
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Lists of former House members List of former senators

show v t Iowa's current delegation to the United States Congress
Senators	Chuck Grassley (R) Joni Ernst (R)
Representatives (ordered by district)	Ashley Hinson (R) Mariannette Miller-Meeks (R) Cindy Axne (D) Randy Feenstra (R)