Data availablity: Presidential election results: 1900-present, by state and county for most states. From 2000 on, data is available at the city level for certain states and counties.
Statewide election results (Senator, Governor): 1938-present with county-level data usually available from 1960-present.
U.S. House of Representatives: 1938-present with county-level data often available from 1992-present.
Select a year, election type and state to begin; if you wish to view House election results from a specific Congressional district then select one from that dropdown.