L2 voter data files include demographic and voter history tables for all 50 states and the District of Columbia. The dataset is built from publicly available government records about voter registration and election participation. These records indicate whether a person voted in an election or not, but they do not record whom that person voted for. Voter registration and election participation data are then augmented by demographic information from third-party data sources. Those data are standardized and enhanced with proprietary commercial data and modeling codes to form separate enhanced state files.
Each version of those data is archived by L2 along with the underlying raw data received from each state in order to maintain a historical record of developments. Data covers as early as 2014 through the present; the exact dates vary by state. The L2 Historical List does not include L2’s most current version of each developed state voter file. If you need the most up-to-date information, use the DataMapping Web Interface.
For a complete list of available historical files, along with the data dictionary, see the record in the WashU Research Data repository. You will need to login in the upper right-hand corner to have full access to the record.
