The aim of this study was to establish the range of psychiatric disorders and psychiatric comorbidity among children and adolescents attending a primary mental health service (PMHS). The main psychiatric diagnostic categories were: oppositional defiant disorders (ODDs) (75.3%), anxiety disorders (36.1%), mood disorders (35.1%), and attention deficit hyperactivity disorders (ADHDs) (28.9%). The study found high rates (61.8%) of psychiatric comorbidity. It concludes that training in the recognition of likely psychiatric comorbidity in this population is essential for professionals working in the interface between primary and specialist services.