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Iowa — U.S. Senate
16 elections · 1976–present · popular vote
2022 Iowa U.S. Senate
Charles E. Grassley R 681,501 · Michael Franken D 533,330
2020 Iowa U.S. Senate
Joni Ernst R 864,997 · Theresa Greenfield D 754,859 · Rick Stewart L 36,961 · Suzanne Herzog 13,800
2016 Iowa U.S. Senate
Charles E. Grassley R 926,007 · Patty Judge D 549,460 · Charles Aldrich L 41,794 · Jim Hennager N 17,649 · +1 more
2014 Iowa U.S. Senate
Joni Ernst R 588,575 · Bruce Braley D 494,370 · Rick Stewart I 26,815 · Douglas Butzier L 8,232 · +2 more
2010 Iowa U.S. Senate
Charles E. Grassley R 718,215 · Roxanne Conlin D 371,686 · John Heiderscheit L 25,290
2008 Iowa U.S. Senate
Tom Harkin D 941,665 · Christopher Reed R 560,006
2004 Iowa U.S. Senate
Charles E. Grassley R 1,038,175 · Arthur Small D 412,365 · Christy Ann Welty L 15,218 · Daryl A. Northrop G 11,121 · +1 more
2002 Iowa U.S. Senate
Tom Harkin D 554,278 · Greg Ganske R 447,892 · Timothy A. Harthan G 11,340 · Richard J. Moore L 8,864
1998 Iowa U.S. Senate
Charles E. Grassley R 648,480 · David Osterberg D 289,049 · Susan Marcus N 7,561 · Margaret Trowe S 2,542
1996 Iowa U.S. Senate
Tom Harkin D 634,166 · Jim Lightfoot R 571,807 · Sue Atkinson N 9,768 · Fred Gratson N 4,248 · +2 more
1992 Iowa U.S. Senate
Charles E. Grassley R 899,761 · Jean Lloyd-Jones D 351,561 · Stuart Zimmerman N 16,403 · Sue Atkinson 6,277 · +5 more
1990 Iowa U.S. Senate
Tom Harkin D 535,975 · Thomas J. Tauke R 446,869
1986 Iowa U.S. Senate
Charles E. Grassley R 588,880 · John O. Roehrick D 299,406 · John Masters N 3,370
1984 Iowa U.S. Senate
Tom Harkin D 716,883 · Roger W. Jepsen R 564,381 · Garry de Young I 11,014
1980 Iowa U.S. Senate
Charles E. Grassley R 683,014 · John Culver D 581,545 · Garry de Young B 5,858 · Robert V Hengerer L 4,233 · +1 more
1978 Iowa U.S. Senate
Roger W. Jepsen R 421,598 · Dick Clark D 395,066 · Gerald Leo Baker I 4,223 · Ben L. Olson L 3,689