How Iowa has voted since 1960

Iowa has 6 electoral votes in 2028. Since 1960 it has voted Democratic 7 times and Republican 10 times. It has backed the national winner in 12 of 17 elections. Donald Trump carried it in 2024 by 13.2 points, 11.7 points more Republican than the nation. In 2024, 71.0% of its eligible voters cast a ballot, ranking 10th among the 50 states and DC (nationally, 64.3%). It has voted Republican in every election since 2016. Its closest result was in 2000, when Al Gore won it by 4,144 votes.

  1. 1960Nixon+13.5
  2. 1964Johnson+24.0
  3. 1968Nixon+12.2
  4. 1972Nixon+17.1
  5. 1976Ford+1.0
  6. 1980Reagan+12.7
  7. 1984Reagan+7.4
  8. 1988Dukakis+10.2
  9. 1992Clinton+6.0
  10. 1996Clinton+10.3
  11. 2000Gore+0.3
  12. 2004Bush+0.7
  13. 2008Obama+9.5
  14. 2012Obama+5.8
  15. 2016Trump+9.4
  16. 2020Trump+8.2
  17. 2024Trump+13.2

Each box is one election: the winner in Iowa and the margin in points. Darker boxes were won by 10 points or more, lighter by under 5.

Election night

9 p.m. ET

Polls close at 9 p.m. ET (8 p.m. Central).

Also closing at 9 p.m. ET: AZ, CO, LA, MN, NE, NM, NY, WI, WY.

Times from the 2024 general election; states rarely change them, and they will be confirmed for 2028.

2028 ratings

Make your own 2028 map →

In Congress

Senate

House: 4 Republicans

All 4 members
  1. 1 Mariannette Miller-Meeks (R)
  2. 2 Ashley Hinson (R)
  3. 3 Zachary Nunn (R)
  4. 4 Randy Feenstra (R)

From Congress.gov, as of Oct. 19, 2026. Vacant seats are not listed.

Margin by election

Iowa margin by electionBars show the Democratic or Republican margin in Iowa in each election since 1960; the line shows the national popular-vote margin. The table below has every figure.R+30R+20R+10EvenD+10D+20D+301960: R+13.5 (nation D+0.2)'601964: D+24.0 (nation D+22.6)'641968: R+12.2 (nation R+0.7)'681972: R+17.1 (nation R+23.2)'721976: R+1.0 (nation D+2.1)'761980: R+12.7 (nation R+9.7)'801984: R+7.4 (nation R+18.2)'841988: D+10.2 (nation R+7.7)'881992: D+6.0 (nation D+5.6)'921996: D+10.3 (nation D+8.5)'962000: D+0.3 (nation D+0.5)'002004: R+0.7 (nation R+2.5)'042008: D+9.5 (nation D+7.3)'082012: D+5.8 (nation D+3.9)'122016: R+9.4 (nation D+2.1)'162020: R+8.2 (nation D+4.5)'202024: R+13.2 (nation R+1.5)'24

Iowa margin National popular vote

By county

Donald Trump won 94 of Iowa's 99 counties in 2024; Kamala Harris won 5.

Loading the county map…

Largest counties, 2024

CountyVotesMarginShift from 2020
Polk County258,067D+10.8→D 3.3
Linn County123,750D+9.8→D 3.1
Scott County90,612R+3.9→R 5.5
Johnson County87,107D+37.6→D 16.2
Dallas County63,330R+4.7→R 3.5
Black Hawk County63,279D+1.1→R 3.2
Dubuque County53,057R+8.5→R 6.9
Story County49,818D+10.2→D 1.8
Pottawattamie County44,766R+19.8→R 11.3
Woodbury County43,247R+22.7→R 14.8

Biggest shifts from 2020 to 2024: toward the Republican, Sioux County (36.7), Lyon County (35.3), Osceola County (32.3); toward the Democrat, Johnson County (16.2), Polk County (3.3), Linn County (3.1) — in points of margin.

County returns from the MIT Election Data and Science Lab (official state data), 2000–2024. Margin is the Democrat's share minus the Republican's, of all votes cast.

Results by year

YearWinnerDemocratRepublicanOtherMarginNationTurnoutEV
2024 Donald TrumpTrumpHarris 42.5%707,278Trump 55.7%927,0191.8%R+13.2R+1.571.0%6
2020 Donald TrumpTrump lostBiden 44.9%759,061Trump 53.1%897,6722.0%R+8.2D+4.572.0%6
2016 Donald TrumpTrumpClinton 41.8%653,669Trump 51.2%800,9837.1%R+9.4D+2.169.2%6
2012 Barack ObamaObamaObama 52.0%822,544Romney 46.2%730,6171.8%D+5.8D+3.970.6%6
2008 Barack ObamaObamaObama 53.9%828,940McCain 44.4%682,3791.7%D+9.5D+7.369.6%7
2004 George W. BushBushKerry 49.2%741,898Bush 49.9%751,9570.9%R+0.7R+2.570.5%7
2000 Al GoreGore lostGore 48.5%638,517Bush 48.2%634,3733.2%D+0.3D+0.561.9%7
1996 Bill ClintonClintonClinton 50.3%620,258Dole 39.9%492,644Perot 8.5%D+10.3D+8.559.6%7
1992 Bill ClintonClintonClinton 43.3%586,353Bush 37.3%504,891Perot 18.7%D+6.0D+5.666.1%7
1988 Michael DukakisDukakis lostDukakis 54.7%670,557Bush 44.5%545,3550.8%D+10.2R+7.761.4%8
1984 Ronald ReaganReaganMondale 45.9%605,620Reagan 53.3%703,0880.8%R+7.4R+18.265.1%8
1980 Ronald ReaganReaganCarter 38.6%508,672Reagan 51.3%676,026Anderson 8.8%R+12.7R+9.763.5%8
1976 Gerald FordFord lostCarter 48.5%619,931Ford 49.5%632,8632.1%R+1.0D+2.1—8
1972 Richard NixonNixonMcGovern 40.5%Nixon 57.6%1.9%R+17.1R+23.2—8
1968 Richard NixonNixonHumphrey 40.8%Nixon 53.0%Wallace 5.7%R+12.2R+0.7—9
1964 Lyndon B. JohnsonJohnsonJohnson 61.9%Goldwater 37.9%0.2%D+24.0D+22.6—9
1960 Richard NixonNixon lostKennedy 43.2%Nixon 56.7%0.1%R+13.5D+0.2—10

Margin is the Democrat's share minus the Republican's, in percentage points; Nation is the same for the national popular vote. "Other" is everyone else combined, or the leading third-party candidate where one took 5% or more. Vote counts from 1976. Turnout is ballots cast as a share of eligible voters, from 1980 (UF Election Lab; the newest year is preliminary).

Electoral votes

Electoral votes change after each census, when House seats are reapportioned.

  • 1019601950 census
  • 91964–19681960 census
  • 81972–19801970 census
  • 81984–19881980 census
  • 71992–20001990 census
  • 72004–20082000 census
  • 62012–20202010 census
  • 62024–20282020 census
  • 62032–2040projected

Projected: Iowa's share of House seats after the 2030 census if each state's population keeps changing at its pace since 2020, from the Census Bureau's 2024 American Community Survey population estimates (July 1, 2024). If the count were taken today it would have 6. An estimate, not a forecast.

Before 1960

Iowa cast electoral votes in 28 presidential elections before 1960, the first in 1848. It backed the eventual president in 21 of them.

YearCarried byElectorsMarginBacked winner
1956Dwight D. Eisenhower Republican10+18.5✓
1952Dwight D. Eisenhower Republican10+28.4✓
1948Harry S. Truman Democratic10+2.8✓
1944Thomas E. Dewey Republican10+4.5–
1940Wendell Willkie Republican11+4.4–
1936Franklin D. Roosevelt Democratic11+12.1✓
1932Franklin D. Roosevelt Democratic11+18.1✓
1928Herbert Hoover Republican13+24.4✓
1924Calvin Coolidge Republican13+27.3✓
1920Warren G. Harding Republican13+47.2✓
1916Charles Evans Hughes Republican13+11.7–
1912Woodrow Wilson Democratic13+4.9✓
1908William Howard Taft Republican13+15.6✓
1904Theodore Roosevelt Republican13+34.7✓
1900William McKinley Republican13+19.1✓
1896William McKinley Republican13+12.8✓
1892Benjamin Harrison Republican13+5.4–
1888Benjamin Harrison Republican13+8.1✓
1884James G. Blaine Republican13+5.3–
1880James A. Garfield Republican11+26.9✓
1876Rutherford B. Hayes Republican11+20.9✓
1872Ulysses S. Grant Republican11+29.8✓
1868Ulysses S. Grant Republican8+23.8✓
1864Abraham Lincoln Republican8+28.2✓
1860Abraham Lincoln Republican4+11.4✓
1856John C. Frémont Republican4+8.1–
1852Franklin Pierce Democratic4+5.7✓
1848Lewis Cass Democratic4+5.9–

Margin: the winner's lead over the runner-up in the state's popular vote, in points. A dash means the legislature chose the electors (common before the 1830s) or no popular vote is on record. Each year links to that election's map and full results.