The 1984 United States presidential election in Tennessee took place on November 6, 1984. All 50 states and the District of Columbia, were part of the 1984 United States presidential election. Tennessee voters chose 11 electors to the Electoral College, which selected the president and vice president of the United States. Tennessee was won by incumbent United States President Ronald Reagan of California, who was running against former Vice President Walter Mondale of Minnesota. Reagan ran for a second time with incumbent Vice President and former C.I.A. Director George H. W. Bush of Texas, and Mondale ran with Representative Geraldine Ferraro of New York, the first major female candidate for the vice presidency. Mondale performed better in Tennessee than any other state that was part of the Confederacy.

Shelby County is the westernmost county in the U.S. state of Tennessee. As of the 2020 census, the population was 929,744. It is the largest of the state's 95 counties, both in terms of population and geographic area. Its county seat is Memphis, a port on the Mississippi River and the second most populous city in Tennessee. The county was named for Governor Isaac Shelby (1750–1826) of Kentucky. It is one of only two remaining counties in Tennessee with a majority African American population, along with Haywood County.