1980 United States presidential election in Mississippi

The 1980 United States presidential election in Mississippi took place on November 4, 1980. All fifty states and The District of Columbia were part of the 1980 United States presidential election. Mississippi voters chose seven electors to the Electoral College, who voted for president and vice president.

Mississippi was won, fairly consistently with predictions, by Reagan with a slim margin of 1.33 points. However, in future elections, the state would become a Republican stronghold, and no Democratic presidential candidate has carried the state since Jimmy Carter in the prior election. As of the 2024 presidential election, this is the last election in which Winston County, Tippah County, Itawamba County, Union County, Prentiss County, Pontotoc County, Lee County, Lafayette County, Attala County, Monroe County, Madison County, Calhoun County, Tate County, Marion County, Leake County, Grenada County, and Franklin County voted for the Democratic candidate, as well as the last time that Clarke County was not carried by the Republican candidate; as Reagan and Carter ended up in a tie in Clarke County.

This is the last presidential election in which Mississippi voted more Democratic than the nation at large. At the time it was the election with the largest number of votes in Mississippi history. This is the second-closest election in Mississippi after 1848 and the only time that a Republican has won Mississippi by a margin of less than 5 points. This was also the seventh election in a row in which Mississippi voted for a different party than the previous election.