The 1984 United States presidential election in Idaho took place on November 6, 1984. All 50 states and the District of Columbia, were part of the 1984 United States presidential election. State voters chose four electors to the Electoral College, which selected the president and vice president of the United States. Idaho 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.

Shoshone County is a county in the U.S. state of Idaho. As of the 2020 census, the population was 13,169. The county seat is Wallace and the largest city is Kellogg. The county was established in 1864, named for the Native American Shoshone tribe.