| Brucellosis is one of the major zoonosis diseases that are still prevalent throughout the world. The present modified cross-sectional study aims to determine the prevalence of brucellosis in apparently healthy dairy cattle/buffaloes in Karachi, Pakistan. A total of 100 farms at different localities of Karachi were visited and milk and blood samples (n=200 each) were collected. These were analysed by Rose Bengal Plate Test (RBPT), complement fixation test (CFT) and milk ring test (MRT). Results indicated a 17.5%, 12.5% seropositive samples by RBPT and CFT, respectively. While, 14% were recorded in the milk samples analysed by MRT. In different areas (towns) prevalence percentage varied highly, ranging from 5.88% to 25%. From these results it could be concluded that brucellosis is present in the apparently healthy dairy cattle and buffaloes of Karachi, however, its prevalence is low comparing with small cities of Pakistan. Furthermore, disease prevalence is diverse in different areas of Karachi. These results emphasize the need for a better monitoring of the disease by government policies or local veterinarians to overcome the disease prevalence.