In United States presidential elections, the national popular vote is the sum of all votes cast in every state and the District of Columbia.
The Twelfth Amendment to the United States Constitution provides the procedure by which the President and Vice President are elected, which is through the Electoral College, so the national popular vote does not determine the outcome of the United States presidential election.
List of United States presidential elections by popular vote margin Wikipedia
The table below is sorted to display elections by their presidential term / year of election, name, margin by percentage in popular vote, popular vote, margin in popular vote by number, and the runner up in the Electoral College.
Note: The popular vote was not recorded prior to the 1824 election, so the first nine US presidential elections are not included in this table.