Iowa

Iowa gained statehood in December 1846. Prior to 1988, the state mostly voted Republican, choosing a candidate from that party all but five times from the Civil War years through 1984. While a battleground every four years, Iowa had sided with the Democrats in six of seven elections from 1992 through 2012. That changed dramatically in 2016, when Donald Trump won the state by over 9%, a 15 point swing from 2012 when Barack Obama won the state by about 6%. Trump won by 8% over Joe Biden in 2020.

Iowa has gradually lost electoral clout as the state’s population growth has been slow relative to the rest of the country. With six electoral votes today, the state has fewer than half of the 13 it had from the 1880s through the 1920s. Despite this, the competitiveness (usually) of the general election vote and the importance of its caucuses, which kick off the nominating process every election cycle, have given the citizens of the Hawkeye State outsized influence on who ultimately gets elected president.

ELECTORAL VOTES

6

2020 ELECTION

Trump Wins
2020 Iowa Polls

Recent Presidential Elections

2020
44.9% 53.1%
2016
41.7% 51.2%
2012
52.0% 46.2%
2008
53.9% 44.4%
2004
49.2% 49.9%
2000
48.5% 48.2%
Show:

Presidential Voting History

State voted with the overall winning candidate

1976
R
1980
R
1984
R
1988
D
1992
D
1996
D
2000
D
2004
R
2008
D
2012
D
2016
R
2020
R

Electoral College Votes

Democratic
Republican

Colored bars represent electoral votes by party. Hover to see names.

U.S. Senate Voting History

  Class 1984198619881990199219941996199820002002200420062008201020122014201620182020
1
2
D
D
D
D
D
R
R
3
R
R
R
R
R
R

Data: MIT Election Data and Science Lab / Harvard Dataverse. These are general election results for the years listed.

There are three classes of Senators; one is up for election every second year. Each state has one Senator in two of the three classes.

U.S. House Voting History

District1984198619881990199219941996199820002002200420062008201020122014201620182020
1
R
R
R
R
R
R
R
R
R
R
R
D
D
D
D
R
R
D
R
2
R
R
R
R
R
R
R
R
R
R
R
D
D
D
D
D
D
D
R
3
R
D
D
D
R
R
D
D
D
D
D
D
D
D
R
R
R
D
D
4
D
D
D
D
D
R
R
R
R
R
R
R
R
R
R
R
R
R
R
5
R
R
R
R
R
R
R
R
R
R
R
R
R
R
6
D
R
R
R

Data: The Princeton Gerrymandering Project. These are general election results for the years listed.

Vertical lines before 1992, 2002 and 2012 show Census-related redistricting breakpoints. Geographic borders associated with district numbers may have changed.

Governor Voting History

1974
R
1978
R
1982
R
1986
R
1990
R
1994
R
1998
D
2002
D
2006
D
2010
R
2014
R
2018
R

Data: Wikipedia. These are general election results for the years listed.