1984 United States presidential election in Wyoming

The 1984 United States presidential election in Wyoming 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 three electors to the Electoral College, which selected the president and vice president of the United States.

Wyoming 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.

The presidential election of 1984 was a very partisan election for Wyoming, with just under 99 percent of the electorate voting for either the Democratic or Republican parties, and only three parties appearing on the ballot. Every county in Wyoming voted in majority for the Republican candidate, a particularly strong turn out even in this typically conservative leaning state. The Republican turnout is softest in the middle Southern part of the State, inclusive and extending West of Laramie, but is ubiquitous.

Wyoming weighed in for this election as 12 points more Republican than the national average and with 70.51% of the popular vote, the state proved to be Reagan's fourth strongest state in the 1984 election after Utah, Idaho and Nebraska. Reagan won the election in Wyoming with a 42-point landslide. No Republican candidate has received as strong of support in the American West at large as Reagan did.

Reagan's performance in this election remains the strongest-ever performance by any presidential nominee in Wyoming, and the only time that a nominee has won more than 70% of the popular vote. This election was the only time that a Republican won consecutive presidential elections by carrying all counties in Wyoming in both instances.