From March 9 to June 5, 1920, voters of the Democratic Party elected delegates to the 1920 Democratic National Convention, for the purposing of choosing a nominee for president in the 1920 United States presidential election.

The race for delegates was made under a cloud of uncertainty because the party's two leading names, President Woodrow Wilson and three-time nominee William Jennings Bryan, withheld their intentions; both men privately hoped for the nomination, but neither's name was formally submitted before the voters or the convention as a candidate.

The delegate elections were inconclusive, with Attorney General A. Mitchell Palmer, Treasury Secretary William Gibbs McAdoo, and Ohio governor James A. Cox leading the candidate field. With no clear front-runner, many states withheld their delegates from any one candidate, instead sending an uncommitted slate of delegates or preferring to back a favorite son on the first ballot. At the convention, Cox was ultimately nominated on the forty-fourth ballot.

Many delegations were not selected in public primaries. The following table shows delegates awarded at a state level by convention, committees, and other means.