Mountain Valley Treatment Center is a residential treatment program in Plainfield, New Hampshire. The program serves adolescents and young adults ages 13 to 20 whose lives have been severely affected by anxiety and related disorders, including obsessive-compulsive disorder (Mountain Valley Treatment Center).

Mountain Valley describes its clinical model as evidence-based treatment in a supportive, family-like environment. Its program page lists exposure and response prevention, cognitive behavioral therapy, and acceptance and commitment therapy as part of a personalized three-phase treatment process (program overview).

The program announced in 2017 that it had purchased a Plainfield property and planned to move from Pike, New Hampshire, to a 25-acre campus in Plainfield. Its current materials describe the campus as located in the Connecticut River Valley near Dartmouth College.