The 1984 United States presidential election in the District of Columbia was held on November 6, 1984. Democratic candidate Walter Mondale won D.C. with 85% of the vote,  giving him 3 electoral votes. In the general election, he only carried a total of 13 electoral votes, the other 10 coming from his home state of Minnesota. The incumbent Ronald Reagan won re-election in 1984, carrying 49 U.S. states.
Mondale's victory in the District of Columbia is the largest out of any location, despite being just one of two locations to vote Democratic, much smaller than the 49 states won by Reagan.