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National Study on Learning, Voting, and Engagement (NSLVE)
Center for Information & Research on Civic Learning and Engagement
Youth Voting and Civic Engagement in America
CIRCLE’s exclusive data tool, Youth Voting and Civic Engagement in America, offers a unique way to explore the relationships between voting and other forms of civic participation, and some of the conditions that shape such engagement. The tool features more than 40 unique indicators, and it includes data at the national, state, congressional district, and county levels.
MIT Election Data & Science Lab: Election Returns Dataverse
Local, State, U.S. House, U.S. Senate, and Presidential Election data, 1976 through 2016 or 2018. Most at county level, some at precinct level.
Includes general, primary, and special elections to federal, gubernatorial, and state legislative office (by county and precinct, generally 2000–present). The project is still in process, but many states have data available, especially for recent general elections. (Precinct-level).
Election Results and Data: Ohio
Source: Ohio Secretary of State
State Legislative Election Returns, 1967-2016
State legislative general election and (some) primary returns (1967–2016) mostly at the district level. Variables include district identifiers, date of election, type of district (Single member (SMD), multimember (MMD), etc.), redistricting status, incumbency status, vote share, uncontested elections, chamber details, and term length. This version of SLERs has been restructured to make the election the unit of analysis.
Record of American Democracy (ROAD) (1984–1990)
All elections at and above State House, along with party registration and other variables, in each state for the roughly 170,000 precincts nationwide.
Data has also been merged with many demographic and socioeconomic variables from Census data. Data can be downloaded to a variety of formats.
U.S. Historical Election Returns Datasets, 1788-1990
ICPSR data collection of county-level electoral returns for all parties and candidates. Data are most complete from 1824 on. 1950–1990 are available as election year files; 1824–1950 are multi-year state files. (Also includes congressional and gubernatorial elections.)
Electoral Data for Counties in the United States: Presidential and Congressional Races, 1840-1972
County-level returns for general elections to the presidency. The variables for the presidential vote include the percentages of ballots cast for major and "significant" minor party candidates, and estimates of voter turnout. Congressional district numbers are also reported for each county for every election. In Stata, SAS, and SPSS formats.