The 100-Hour Plan was a United States Democratic Party political strategy detailing the actions the party pursued upon assuming leadership of the 110th Congress on January 4, 2007. The strategy was announced before the 2006 midterm elections. Speaker Nancy Pelosi pledged that her party would continue to pursue these goals upon her assumption of leadership. The 100-hour time period refers to business hours and not actual time, and has alternately been termed "100 legislative hours"; Pelosi's spokesman Brendan Daly defined the starting point this way: "It's when the House convenes, after the one-minutes and before the special orders."

The 110th United States Congress was a meeting of the legislative branch of the United States federal government, between January 3, 2007, and January 3, 2009, during the last two years of the Presidency of George W. Bush. It was composed of the Senate and the House of Representatives. The apportionment of seats in the House was based on the 2000 U.S. census.