(Digest of the french version)

ATLAS OF THE U.S. PRESIDENTIAL ELECTIONS SINCE 1789





What happened in 2004


The 2008 democratic party primaries: map by counties!       -       What happened from 2004 to 2008


What happened from 2008 to 2012


What happened from 2012 to 2016


What happened from 2016 to 2020, with the explanatory maps


STATISTICAL SOURCES


Presidential election results by county and state :
-- M. J. Dubin : United States Presidential Elections, 1788-1860
-- W. D. Burnham : Presidential Ballots, 1836-1892
-- E. E. Robinson : The Presidential Vote : 1896 to 1932
-- R. M. Scammon : America at the Polls (1920-1964)
-- R. M. Scammon : America at the Polls (1968-1984)
-- R. M. Scammon / A. McGillivray : America Votes n° 18, 1988; n° 20, 1992; n° 22, 1996; n° 24, 2000
Plus:
-- Various almanacs to complete MM. Dubin, Burnham and Robinson, especially The Chicago Daily News Almanac.
      Indeed, these publications sometimes made mistakes when copying the documents they had, which is human but harmful. Either by making a mistake on an isolated number, or by inverting the results of two consecutive counties, or even by getting the wrong candidate. Moreover, it should be noted that all these authors except Robinson chose, when they had the detailed results of the lists of electors, the one who came first in the State, whereas the almanacs and most often the official publications chose the head of list, and therefore resulted in sometimes slightly lower figures.
And since 2004:
-- Secretary of state for all states and all ballots.
Electoral participation (popular vote) by county :
-- Electoral returns by counties and datas of the Bureau of the Census regarding 1880, 1920, 1960, 2000 and 2010.

Conception et réalisation : Frédéric SALMON