The 2008 Colorado Democratic presidential caucuses took place on Super Tuesday, February 5, 2008. As he did in every other state that held a caucus rather than a primary, Barack Obama won the caucus by a wide, two-to-one margin over Hillary Clinton.

From January 3 to June 3, 2008, voters of the Democratic Party chose their nominee for president in the 2008 United States presidential election. Senator Barack Obama of Illinois was selected as the nominee, becoming the first African American to secure the presidential nomination of any major political party in the United States. However, due to a close race between Obama and Senator Hillary Clinton of New York, the contest remained competitive for longer than expected; neither candidate received enough pledged delegates from state primaries and caucuses to achieve a majority, without endorsements from unpledged delegates (superdelegates).