Although published treatment guidelines recommend cognitive and/or behavioral therapies as the first-line treatment for posttraumatic stress disorder (PTSD), recent research has shown that interpersonal psychotherapy (IPT) represents a promising treatment option for PTSD. We report a case study describing the use of IPT to treat symptoms of PTSD due to military sexual trauma in a female veteran. Following a brief course of IPT, the veteran reported significant improvement in symptoms of PTSD and depression and positive changes in her relationships with important others in her life. While case studies are by nature limited, the treatment course described here offers initial support for IPT as an alternative treatment approach for military sexual trauma–related symptoms of PTSD, particularly in cases in which depression is a co-occurring treatment consideration. (PsycINFO Database Record (c) 2018 APA, all rights reserved)