1984 United States presidential election in Oregon

The 1984 United States presidential election in Oregon took place on November 6, 1984. All fifty states and the District of Columbia were part of the 1984 United States presidential election. Voters chose seven electors to the Electoral College, which selected the president and vice president of the United States.

Oregon 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 Oregon, with the Democratic or Republican parties the only parties appearing on the ballot. The vast majority of counties turned out for Reagan, including the eastern interior and southwestern Rogue Valley. The only exceptions were Lane County in the central west, which had voted Republican in 1980, and three counties along the lower Columbia River, including Portland's highly populated Multnomah County, which has been a Democratic stronghold since last voting for Republican Richard Nixon in 1960.

Oregon weighed in for this election as 3% more Democratic than the national average. As of the 2020 presidential election, it is the last time Oregon has voted for a Republican in a presidential election, and also the last time Lincoln County, Benton County and Hood River County have voted for a Republican presidential nominee. It also marks the last time any presidential candidate won Oregon while carrying the majority of its counties.

No Republican candidate has received as strong of support in the American Pacific states at large as Reagan did. This is also the most recent election cycle where Oregon sent Republican electors to the Electoral College.