The objective of this paper is to provide a review on the psychiatric comorbidity research in India based on the data published in the last six decades. The comorbidity data world over reflects that it is a much more common phenomenon than observed in routine clinical practice. In India, research into this domain of psychiatry has been limited, with comorbidity reported to be as high as 60%. In the few publications in this area, most of the authors have looked into substance related comorbidity. Small numbers of studies have looked into comorbid conditions in child psychiatry, especially mental retardation and very few studies have looked at other comorbidities. The landmarks in the studies in the area of psychiatric comorbidity have been highlighted in this review article.