MIT Election Lab: .Supports advances in election science by collecting, analyzing, and sharing core data and findings.
Political Advertising on Google: .To help everyone understand the ads they see online, this report from Google includes information about verified advertisers, spending on ads related to elections.
Census Data Center: .Helpful site from Missouri for advanced analysis of Census data
Harvard Election Data Archive: .This archive contains data on election results, voting behavior, and electoral politics, with particular focus on the United States.