The 1984 United States presidential election in Iowa took place on November 6, 1984. All 50 states and the District of Columbia, were part of the 1984 United States presidential election. Voters chose eight electors to the Electoral College, which selected the president and vice president of the United States. Iowa was won by incumbent United States President Ronald Reagan of California, who was running against former Vice President Walter Mondale of Minnesota. While the majority of counties turned out for Reagan, the politically volatile state of Iowa was a relatively narrow victory for him, thanks in part to the Midwest Farm Crisis of the early 1980s. The relatively weak Republican trend for this election is highlighted by the loss of Des Moines's highly populated Polk County to Mondale.
Iowa weighed in for this election as 11 points more Democratic than the national average. , this is the last election in which Black Hawk County (Waterloo), Linn County (Cedar Rapids), and Story County (Ames) voted for a Republican presidential candidate. Iowa would not vote Republican again until 2004.
A Democratic Party presidential debate was held in Des Moines on February 11, 1984, with Walter Mondale, George McGovern, Gary Hart, John Glenn, Alan Cranston, Fritz Hollings and Reubin Askew participating.
Governor Terry Branstad was the chair of Reagan's campaign in Iowa.
Michael Triggs, Monty Bertelli, Herbert Blume, Richard Johnson, Larry Allen, Claudine Mansfield, Margaret Severino, and Grace Copley served as presidential electors for Reagan.
Reagan carried 5 of 6 congressional districts, including one held by Democrats.