The National Institutes of Mental Health has identified the use of empirically based mental health treatments (i.e., treatments with research supporting efficacy) as a priority, yet there is a shortage of clinicians trained in these approaches. This study develops an on-line therapist training program for Interpersonal Psychotherapy (IPT), a particularly well-researched yet particularly little disseminated, empirically based treatment, in order to facilitate wider dissemination of this approach.