List of United States Senators from Iowa

Iowa was admitted to the Union on December 28, 1846.

Class 2

SenatorPartyFrom To
George W. JonesDemocrat18481859
James W. GrimesRepublican18591869
James B. HowellRepublican18701871
George G. WrightRepublican18711877
Samuel J. KirkwoodRepublican18771881
James W. McDillRepublican18811883
James F. WilsonRepublican18831895
John H. GearRepublican18951900
Jonathan P. DolliverRepublican19001910
Lafayette YoungRepublican19101911
William S. KenyonRepublican19111922
Charles A. RawsonRepublican1922
Smith W. BrookhartRepublican19221926
Daniel F. SteckDemocrat19261931
Lester J. DickinsonRepublican19311937
Clyde L. HerringDemocrat19371943
George A. WilsonRepublican19431949
Guy M. GilletteDemocrat19491955
Thomas E. MartinRepublican19551961
Jack R. MillerRepublican19611973
Richard C. ClarkDemocrat19731979
Roger W. JepsenRepublican19791985
Tom HarkinDemocrat1985

Class 3

SenatorPartyFrom To
Augustus C. DodgeDemocrat18481855
James HarlanWhig,
Republican
18551865
Samuel J. KirkwoodRepublican18661867
James HarlanRepublican18671873
William B. AllisonRepublican18731908
Albert B. CumminsRepublican19081926
David W. StewartRepublican19261927
Smith W. BrookhartRepublican19271933
Richard L. MurphyDemocrat19331936
Guy M. GilletteDemocrat19361945
Bourke B. HickenlooperRepublican19451969
Harold E. HughesDemocrat19691975
John C. CulverDemocrat19751981
Charles E. GrassleyRepublican1981
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