The 2008 Oklahoma Democratic presidential primary, part of the process of selecting that party's nominee for President of the United States, took place on February 5, one of the many nominating contests of 2008's "Super Tuesday".

The primary election chose 38 pledged delegates to represent Oklahoma at the 2008 Democratic National Convention.

Clinton, Barack Obama, and Jim Rogers appeared on the ballot, together with four candidates who had already withdrawn from the contest: Chris Dodd, Bill Richardson, Dennis Kucinich, and John Edwards.

Early polling in Oklahoma consistently showed Clinton and Edwards to be the leaders in the state, and Obama a more distant third.

Former President Bill Clinton stopped at the University of Oklahoma on January 30 to speak at a rally supporting his wife.