Electoral Data for Counties in the United States: Presidential and Congressional Races, 1840-1972

This collection contains county-level returns for elections to the United States presidency and to the United States House of Representatives for the years 1840 to 1972. The variables for the presidential vote include the percentages of ballots cast for major and "significant" minor party candidates (with residual votes collapsed into an "other" category), total numbers of votes for all candidates in an election, and estimates of voter turnout in the presidential elections. There are similar variables for the congressional vote except that returns are reported for parties and not for candidates. Congressional district numbers are also reported for each county for every election.

本数据集收录了1840年至1972年间美国总统选举与美国众议院选举的县级选举结果。总统选举相关变量涵盖了主要政党及"重要"小众政党候选人得票占比（剩余选票将被合并至"其他"类别）、选举中所有候选人的总得票数，以及总统选举的选民投票率估算值。国会选举的相关变量设置与总统选举类似，但其选举结果按政党而非候选人进行统计。每次选举中，每个县对应的国会选区编号也会一并记录。