Jenna Jameson was arrested on suspicion of DUI early this morning in Orange County ... TMZ has learned.

Law enforcement sources tell TMZ the porn queen was involved in a single car accident at around 1:30 AM after her car struck a light pole.

According to our sources, Jameson showed signs of possibly being under the influence of alcohol and was given a field sobriety test . We're told she was subsequently arrested for misdemeanor suspicion of DUI.

She is currently in custody and she will be cited and released.

7:27 AM PDT -- Law enforcement officials say Jenna sustained minor injuries in the crash ... but refused medical treatment.

Cops say Jenna has been released from custody.