The 111th United States Congress was a meeting of the legislative branch of the United States federal government from January 3, 2009, until January 3, 2011. It began during the last weeks of the George W. Bush administration, with the remainder spanning the first two years of Barack Obama's presidency. 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.

Barack Obama's tenure as the 44th president of the United States began with his first inauguration on January 20, 2009, and ended on January 20, 2017. Obama, a Democrat from Illinois, took office following his victory over Republican nominee John McCain in the 2008 presidential election. Four years later, in the 2012 presidential election, he defeated Republican nominee Mitt Romney, to win re-election. Obama is the first African American president, the first multiracial president, the first non-white president, and the first president born in Hawaii. Obama was limited to two terms and was succeeded by Republican Donald Trump, who won the 2016 presidential election.