U.S. Election Atlas

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Details counts and percentages for elections for President, Senate, and House of Representatives, turnout rate using VAP
Topics Elections, politics
Source Dave Leip’s Atlas of U.S. Presidential Elections
Years Available 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022, 2024
Geographies County, state, congressional districts (for congressional races)
Public Edition or Subscriber-only Subscriber-only
Download Available no
For more information http://uselectionatlas.org/
Last updated on PolicyMap September 2025

Description:

Dave Leip’s Atlas of U.S. Presidential Elections provides information on elections for president, senate, and house of representatives. County-level data for Alaska is not included because Alaska does not report its election results by county. Turnout data is only available for Presidential and Senate elections, as Census population estimates for the voting-age population is not available at the congressional district.

Margin of victory maps provide a handy guide to see who won a given geography, and by how much. Values are calculated by subtracting the number of votes for the runner-up candidate from the number of votes for the winning candidate, and dividing that number by the total number of votes cast. Ranges, and not specific numbers, are available for each area.

Change in percent represents the change in a candidate’s vote share between elections. Calculated by subtracting the previous comparable election’s vote percentage from the current election’s vote percentage. For example, if John Kerry won 45% of a county in 2004, and Barack Obama won 55% of that county in 2008, the change in percent would be 10%.

  • For House of Representative elections, change is calculated every two years
  • For Senate elections, change is calculated every six years. If a special election occurs, it will be displayed within the info bubble.
  • When elections are uncontested (ie., a candidate from one party runs, and no other candidates from another party run), the winner is assigned 100% of the votes, and no vote data is reported for the non-existent or non-contesting candidates.

The Congressional district boundaries changed in 2012 due to redistricting. Some states gained districts and some states lost districts, and within each state, the shapes of most districts changed. For this reason, change-in-percent calculations are not possible from the 2010 Congressional election to the 2012 election. Additionally, some boundaries in Florida, North Carolina, and Virginia changed in 2016 due to redistricting; percent changes are not shown in 2016 for these districts. Results from the North Carolina 9th Congressional District are suppressed.

Available Data Layers & Indicators (129)
Percent margin of victory in the 2004 Presidential general election.
Percent margin of victory in the 2004 Senate general election.
Percent margin of victory in the 2004 U.S. House of Representatives general election.
Percent margin of victory in the 2006 Senate general election.
Percent margin of victory in the 2006 U.S. House of Representatives general election.
Percent margin of victory in the 2008 Presidential general election.
Percent margin of victory in the 2008 Senate general election.
Percent margin of victory in the 2008 U.S. House of Representatives general election.
Percent margin of victory in the 2010 Senate general election.
Percent margin of victory in the 2010 U.S. House of Representatives general election.
Percent margin of victory in the 2012 Presidential general election.
Percent margin of victory in the 2012 Senate general election.
Percent margin of victory in the 2012 U.S. House of Representatives general election.
Percent margin of victory in the 2014 Senate general election.
Percent margin of victory in the 2014 U.S. House of Representatives general election.
Percent margin of victory in the 2016 Presidential general election.
Percent margin of victory in the 2016 Senate general election.
Percent margin of victory in the 2016 U.S. House of Representatives general election.
Percent margin of victory in the 2018 Senate general election.
Percent margin of victory in the 2018 U.S. House of Representatives general election.
Percent margin of victory in the 2020 Presidential general election.
Percent margin of victory in the 2020 Senate general election.
Percent margin of victory in the 2020 U.S. House of Representatives general election.
Percent margin of victory in the 2022 Senate general election.
Percent margin of victory in the 2022 U.S. House of Representatives general election.
Percent margin of victory in the 2024 Presidential general election.
Percent margin of victory in the 2024 Senate general election.
Percent margin of victory in the 2024 U.S. House of Representatives general election.
Percent of votes for Democrat Barack Obama in the 2008 presidential general election.
Percent of votes for Democrat Barack Obama in the 2012 presidential general election.
Percent of votes for Democrat Hillary Clinton in the 2016 presidential general election.
Percent of votes for Democrat John Kerry in the 2004 presidential general election.
Percent of votes for Democrat Joseph Biden in the 2020 presidential general election.
Percent of votes for Democrat Kamala Harris in the 2024 presidential general election.
Percent of votes for Republican Donald Trump in the 2016 presidential general election.
Percent of votes for Republican Donald Trump in the 2020 presidential general election.
Percent of votes for Republican Donald Trump in the 2024 presidential general election.
Percent of votes for Republican George W. Bush in the 2004 presidential general election.
Percent of votes for Republican John McCain in the 2008 presidential general election.
Percent of votes for Republican Mitt Romney in the 2012 presidential general election.
Percent of votes for a Democrat in the 2004 Senate general election.
Percent of votes for a Democrat in the 2004 U.S. House of Representatives election.
Percent of votes for a Democrat in the 2006 Senate general election.
Percent of votes for a Democrat in the 2006 U.S. House of Representatives election.
Percent of votes for a Democrat in the 2008 Senate general election.
Percent of votes for a Democrat in the 2008 U.S. House of Representatives election.
Percent of votes for a Democrat in the 2010 Senate general election.
Percent of votes for a Democrat in the 2010 U.S. House of Representatives election.
Percent of votes for a Democrat in the 2012 Senate general election.
Percent of votes for a Democrat in the 2012 U.S. House of Representatives election.
Percent of votes for a Democrat in the 2014 Senate general election.
Percent of votes for a Democrat in the 2014 U.S. House of Representatives election.
Percent of votes for a Democrat in the 2016 Senate general election.
Percent of votes for a Democrat in the 2016 U.S. House of Representatives election.
Percent of votes for a Democrat in the 2018 Senate general election.
Percent of votes for a Democrat in the 2018 U.S. House of Representatives election.
Percent of votes for a Democrat in the 2020 Senate general election.
Percent of votes for a Democrat in the 2020 U.S. House of Representatives election.
Percent of votes for a Democrat in the 2022 Senate general election.
Percent of votes for a Democrat in the 2022 U.S. House of Representatives election.
Percent of votes for a Democrat in the 2024 Senate general election.
Percent of votes for a Democrat in the 2024 U.S. House of Representatives election.
Percent of votes for a Republican in the 2004 Senate general election.
Percent of votes for a Republican in the 2004 U.S. House of Representatives election.
Percent of votes for a Republican in the 2006 Senate general election.
Percent of votes for a Republican in the 2006 U.S. House of Representatives election.
Percent of votes for a Republican in the 2008 Senate general election.
Percent of votes for a Republican in the 2008 U.S. House of Representatives election.
Percent of votes for a Republican in the 2010 Senate general election.
Percent of votes for a Republican in the 2010 U.S. House of Representatives election.
Percent of votes for a Republican in the 2012 Senate general election.
Percent of votes for a Republican in the 2012 U.S. House of Representatives election.
Percent of votes for a Republican in the 2014 Senate general election.
Percent of votes for a Republican in the 2014 U.S. House of Representatives election.
Percent of votes for a Republican in the 2016 Senate general election.
Percent of votes for a Republican in the 2016 U.S. House of Representatives election.
Percent of votes for a Republican in the 2018 Senate general election.
Percent of votes for a Republican in the 2018 U.S. House of Representatives election.
Percent of votes for a Republican in the 2020 Senate general election.
Percent of votes for a Republican in the 2020 U.S. House of Representatives election.
Percent of votes for a Republican in the 2022 Senate general election.
Percent of votes for a Republican in the 2022 U.S. House of Representatives election.
Percent of votes for a Republican in the 2024 Senate general election.
Percent of votes for a Republican in the 2024 U.S. House of Representatives election.
Percent of votes for a third-party or write-in candidate in the 2004 presidential general election.
Percent of votes for a third-party or write-in candidate in the 2008 presidential general election.
Percent of votes for a third-party or write-in candidate in the 2012 presidential general election.
Percent of votes for a third-party or write-in candidate in the 2016 presidential general election.
Percent of votes for a third-party or write-in candidate in the 2020 presidential general election.
Percent of votes for a third-party or write-in candidate in the 2024 presidential general election.
Percent of votes for a third-party or write-in in the 2004 Senate general election.
Percent of votes for a third-party or write-in in the 2004 U.S. House of Representatives election.
Percent of votes for a third-party or write-in in the 2006 Senate general election.
Percent of votes for a third-party or write-in in the 2006 U.S. House of Representatives election.
Percent of votes for a third-party or write-in in the 2008 Senate general election.
Percent of votes for a third-party or write-in in the 2008 U.S. House of Representatives election.
Percent of votes for a third-party or write-in in the 2010 Senate general election.
Percent of votes for a third-party or write-in in the 2010 U.S. House of Representatives election.
Percent of votes for a third-party or write-in in the 2012 Senate general election.
Percent of votes for a third-party or write-in in the 2012 U.S. House of Representatives election.
Percent of votes for a third-party or write-in in the 2014 Senate general election.
Percent of votes for a third-party or write-in in the 2014 U.S. House of Representatives election.
Percent of votes for a third-party or write-in in the 2016 Senate general election.
Percent of votes for a third-party or write-in in the 2016 U.S. House of Representatives election.
Percent of votes for a third-party or write-in in the 2018 Senate general election.
Percent of votes for a third-party or write-in in the 2018 U.S. House of Representatives election.
Percent of votes for a third-party or write-in in the 2020 Senate general election.
Percent of votes for a third-party or write-in in the 2020 U.S. House of Representatives election.
Percent of votes for a third-party or write-in in the 2022 Senate general election.
Percent of votes for a third-party or write-in in the 2022 U.S. House of Representatives election.
Percent of votes for a third-party or write-in in the 2024 Senate general election.
Percent of votes for a third-party or write-in in the 2024 U.S. House of Representatives election.
Turnout rate among voter-age population (18+) in the 2004 U.S. Presidential election.
Turnout rate among voter-age population (18+) in the 2004 U.S. Senate general election.
Turnout rate among voter-age population (18+) in the 2006 U.S. Senate general election.
Turnout rate among voter-age population (18+) in the 2008 U.S. Presidential election.
Turnout rate among voter-age population (18+) in the 2008 U.S. Senate general election.
Turnout rate among voter-age population (18+) in the 2010 U.S. Senate general election.
Turnout rate among voter-age population (18+) in the 2012 U.S. Presidential election.
Turnout rate among voter-age population (18+) in the 2012 U.S. Senate general election.
Turnout rate among voter-age population (18+) in the 2014 U.S. Senate general election.
Turnout rate among voter-age population (18+) in the 2016 U.S. Presidential election.
Turnout rate among voter-age population (18+) in the 2016 U.S. Senate general election.
Turnout rate among voter-age population (18+) in the 2018 U.S. Senate general election.
Turnout rate among voter-age population (18+) in the 2020 U.S. Presidential election.
Turnout rate among voter-age population (18+) in the 2020 U.S. Senate general election.
Turnout rate among voter-age population (18+) in the 2022 U.S. Senate general election.
Turnout rate among voter-age population (18+) in the 2024 U.S. Presidential election.
Turnout rate among voter-age population (18+) in the 2024 U.S. Senate general election.