Bầu cử tổng thống Hoa Kỳ tại Pennsylvania năm 2000

The 2000 United States presidential election in Pennsylvania took place on November 7, 2000, and was part of the 2000 United States presidential election. Voters chose 23 representatives, or electors, to the Electoral College, who voted for president and vice president.

Because President Bill Clinton, a Democrat, had won two elections, he could not run for a third term under the provision of the Twenty-second Amendment to the United States Constitution. The Democratic presidential nominee, Vice President Al Gore, won Pennsylvania by a 4.17% margin of victory over his Republican opponent, Texas Governor George W. Bush. However, voter enthusiasm for both candidates was generally low throughout the campaign. Gore failed to capture Clinton's appeal in strongly Democratic regions such as Pittsburgh and Scranton and thus carried these areas by a smaller number than his predecessor. However, opposition to Bush was particularly strong in the suburban counties of Philadelphia; although these areas at the time were typically Republican-leaning, they featured a strong culturally liberal bent, and thus Bush was unable to appeal to voters. Bush support was particularly strong in rural, central Pennsylvania, where he appealed to Evangelical voters and where Gore's connection to gun control policies was strongly rejected. Marginal wins in both of the state's metropolitan areas helped the Vice President to capture the state. This was the first election since 1968 that the candidate who won Pennsylvania did not win the general election, and only the fourth time that has happened since 1916. As of the 2024 presidential election, this is the last election in which Greene County, Mercer County, and Lawrence County voted for the Democratic candidate.

Bush became the first Republican ever to win the White House without carrying Delaware County, the first to win the White House without carrying Montgomery County since Rutherford B. Hayes in 1876, the first to win the White House without carrying Bucks County – which he had lost by precisely the same margin he had lost the state as a whole – since Benjamin Harrison in 1888, and the first to win the White House without carrying Lehigh County since William McKinley in 1900.

Pennsylvania was one of ten states that backed George H. W. Bush for president in 1988 that did not back George W. Bush in either 2000 or 2004. In 2000, George W. Bush lost in eleven states his father won in 1988. In 2004, this was reduced to ten through George W. Bush's gains of New Mexico and Iowa, and his loss in New Hampshire.