Iowa U.S. Senators (2026)
IA · U.S. Senate Delegation
Joined the Union
December 28, 1846
Population (Est.)
3,207,004
Current U.S. Senators
Delegation Voting Summary
119th CongressAgreement Rate
99.2%
Joni Ernst and Chuck Grassley voted the same way on 844 of 851 shared votes
Both are Republicans
Joni Ernst
Senior Senator
Party Unity
99.1%
Missed Votes
2.1%
871 votes cast of 890 roll calls
Chuck Grassley
Junior Senator
Party Unity
99.2%
Missed Votes
2.7%
866 votes cast of 890 roll calls
Former Senators from Iowa
All 32 former U.S. senators who represented Iowa, most recent first.
- Tom Harkin 1985 – 2015
- Roger Jepsen 1979 – 1985
- John Culver 1975 – 1981
- Dick Clark 1973 – 1979
- Harold Hughes 1969 – 1975
- Jack Miller 1961 – 1973
- Bourke Hickenlooper 1945 – 1969
- Thomas Martin 1955 – 1961
- Guy Gillette 1936 – 1955
- George Wilson 1943 – 1949
- Clyde Herring 1937 – 1943
- Lester Dickinson 1931 – 1937
- Richard Murphy 1933 – 1936
- Smith Brookhart 1922 – 1933
- Daniel Steck 1926 – 1931
- David Stewart 1926 – 1927
- Albert Cummins 1908 – 1926
- Charles Rawson 1922
- William Kenyon 1911 – 1922
- Lafayette Young 1910 – 1911
- Jonathan Doliver 1900 – 1910
- William Allison 1873 – 1908
- John Gear 1895 – 1900
- James Wilson 1883 – 1895
- James McDill 1881 – 1883
- Samuel Kirkwood 1866 – 1881
- George Wright 1871 – 1877
- James Harlan 1855 – 1873
- James Howell 1870 – 1871
- James Grimes 1859 – 1869
- George Jones 1848 – 1859
- Augustus Dodge 1848 – 1855