A housefly deterrent device is an apparatus used to deter houseflies from approaching a particular area. The apparatus is also configured to mount to an appropriate area for ease of positioning and maintenance and does not rely on chemical compounds to affect houseflies. The apparatus includes a visual deterrent, an orienting fixture, and an attachment mechanism. The visual deterrent is a structure which mimics the physical appearance of the housing of various predators of houseflies sufficiently to affect the general behavior of houseflies. The orienting fixture is a mount which supports and arranges the visual deterrent in position, preferably adjacent to a door or a building entrance. The attachment mechanism is an arrangement of components that allows for connection of the orienting fixture to surfaces or relevant structures proximal to a target housefly protection zone. The visual deterrent is removable, facilitating adjustment, and general maintenance.