The article first describes various types of personality disorder and how their behavioral manifestations will be played out in a typical correctional setting. The personality disorders described include the paranoid or schizotypal personality disorder, histrionic personality disorder, narcissistic personality disorder, and antisocial personality disorder. As a further complication, many, if not most, of those with personality disorders also have diagnosable Axis I disorders such as mood disorders, traumatic stress disorders, anxiety disorders, and psychotic disorders. In parallel with other major Axis I syndromes, substance abuse and dependence are common comorbidities among those with personality disorders. The treatment opportunities discussed in this article are behavioral management, psychotherapy, and psychopharmacology. Implications are discussed for custody collaboration and discharge planning. 29 references