There are numerous Musca domestica (houseflies) in Jos environment which may carry parasites of public health importance. The eating and meat processing tables Jos in Jos do not lack the flies. The study was aimed at discovering the species and prevalence of parasites found in houseflies in Jos. 400 houseflies were captured from four areas of Jos metropolis - Old Bukuru Park, Abattoir, FSMLT hostel & Terminus and taken to the Federal School Medical Laboratory in Jos for parasite identification analysis of the internal and external parts of houseflies using Ochei & Kalhatkah method. The prevalence of parasites seen in the study are: Hookworm (32.9%), Strongyloides stercoralis (21.1%), Entamoeba histolytica (16.8%), Ascaris lumbricoides (13.2%), Fasciola spp (7.5%), Teania spp (5.7%), and Balantidium coli (2.9%). The study shows that both the external and internal parts of the flies in Jos Metropolis carried various concentration of parasites depending on the various locations understudy which includes: Hookworm, Strongyloides stercoralis, Entamoeba Histolytica, Ascaris lumbricoides, Fasciola specie, Taenia specie, and Balantidium coli. The implication is that the numerous flies amidst various hips of refuse in various areas of the metropolis could overwhelm community health professionals if not prevented. The parasites seen in his study can cause serious public health challenges in Jos Metropolis and therefore, needs the public health attention to reduce parasitic spread of infection in the Metropolis.