1988 United States presidential election in Colorado

The 1988 United States presidential election in Colorado took place on November 8, 1988, as part of the 1988 United States presidential election, which was held throughout all 50 states and D.C. Voters chose eight representatives, or electors to the Electoral College, who voted for president and vice president.

Colorado voted for the Republican nominee, Vice President George H. W. Bush, over the Democratic nominee, Massachusetts Governor Michael Dukakis, by a margin of 7.78%. Bush took 53.06% of the vote to Dukakis' 45.28%. While the Republicans held onto Colorado's eight electoral votes, Bush's 53–45 win over Dukakis represented a vastly diminished margin compared to 1984, when Ronald Reagan had won the state in a 63–35 landslide over Walter Mondale. Unlike in the several preceding elections, Colorado voted roughly in line with the nation overall, which Bush won by 7.72%. Dukakis made substantial inroads by improving on Mondale's vote share in the city of Denver by over 10% (getting the highest vote share of any nominee in the city since Lyndon Johnson in 1964), becoming the first Democrat since 1964 (and only the second since 1936) to carry Boulder County, and comfortably reclaiming Pitkin County, which had supported McGovern in 1972 but had gone on to vote Republican in the next three elections.

As of the 2020 presidential election, this is the last election in which Summit County voted for a Republican presidential candidate. Bush became the first Republican to win the White House without carrying Boulder or Saguache Counties since William Howard Taft in 1908.

Counties that flipped from Republican to Democratic

 * Lake
 * Conejos
 * Pitkin
 * San Miguel
 * Boulder
 * Adams
 * Gilpin
 * Bent
 * Saguache