The 2016 Oklahoma Democratic presidential primary took place on March 1 in the U.S. state of Oklahoma as one of the Democratic Party's primaries ahead of the 2016 presidential election.

A majority of voters in the primary said they thought Clinton was not honest or trustworthy, 51-47.

He performed strongly in the major cities of Norman, Stillwater, Enid, and Moore.

Sanders won most of the rural, majority white and deeply conservative counties of the state, including those in the Oklahoma Panhandle, Little Dixie, and Southwestern Oklahoma which are among the most radically conservative areas of the nation.

The Little Dixie region in particular was the base of President Bill Clinton's support in the 1992 and 1996 elections, as this area consists of socially conservative but economically liberal Democrats, many of whom were drawn to Sanders's opposition to trade deals like NAFTA.