Plasma cell tumour(PCT) is a type of round cell tumour occurring in dogs, the other round cell tumours being mast cell tumour, transmissible venereal tumour, lymphoma and histiocytoma. In our study, a total of 36 cases of PCT were diagnosed from cutaneous masses in skin using cytological and histopathological methods. The highest incidence was recorded in Labrador and non-descript breeds, in male dogs, in dogs of age group 5-10 years and in trunk in breed, sex, age and in location wise analysis of tumour occurrence. Cytologic examination revealed abundant round neoplastic cells with distinct cell borders, eccentrically placed nuclei with perinuclear halo and prominent nucleoli. Histopathological examination revealed sheet of pleomorphic round neoplastic cells containing eccentric placed round to oval nuclei along with mitotic figures and multinucleated cells.