Lymphoma was diagnosed in 331 dogs based on cytological examination of clinical samples which accounted to an incidence of 5.88% of the total tumours diagnosed during the period. The highest incidence of lymphoma was recorded in non-descript, Labrador, Dobermann, German shepherd breeds, male dogs, and dogs of age group 5-10 years and 1-5 years in breed, sex and age wise analysis of tumour incidence. In cytological examination, the smears displayed high cellularity with monomorphic population of medium to large sized lymphoblasts exhibiting moderate anisocytosis and anisokaryosis and containing round to spherical to indented nucleus placed centrally or eccentrically. Nucleoli appeared as single large to multiple prominent. The cytoplasm was basophilic and appeared as a narrow marginal rim around the nucleus. Increased number of mitotic figures and lymphoglandular bodies were also seen. Histopathological studies revealed sheets of monomorphic neoplastic lymphocyte cells with round nuclei.