The objective of this study was to isolate and identify bacteria found in natural association with adults of Musca domestica.In this study adults of Musca dometica were collected from four sites in Sulamani city,Kudistan,Iraq to isolate and identify bacteria on the external surface of house flies . Bacteria from fly samples isolated using the conventional isolation technique were E.coli , Pseudomonas aeruginosa , Staphylococcus albus , Staphylococcus aureus , Salmonella sp. and Klebsiella sp. The results of current study confirm that the houseflies are much more than nuisance and they pose potentially serious health risks. Consequently, the population of houseflies has to be controlled.