A survey for Dipterous flies was conducted in 3 private sheep's' farms and  3 governmental slaughter houses at Abu Arish, Alquayiyah, (Eastern  Jazan); Duhaygah and Mihliyah (Northern Jazan); Mizhirah and Industrial City (Southern Jazan). Each locality was visited weekly to collect the flies using aerial sweeping net. A total of 5312 specimens consisting of 12 species, 1 subspecies within 8 genera, belonging to 7 families: Calliphoridae, Sarcophagidae, Muscidae, Ceratopogonidae, Utilidae, Sphaeroceridae, and Chloropidae were recorded.  Among the total flies collected in all localities Coproica vegans (Haliday) was the most abundant species followed by Anatricus erianceus Loew and they represented 72.74% and 21.71% of the total collection, respectively.  On the other hand, Culicoides imicola  Kieffer, Sarcophaga  ruficornis (Fabricius) and Musca lucidula (Loew) were recorded in few numbers and they represented 0.09%- 0.1% of the total collection. Physiphora alceae (Preyssler) and Musca   sorbens Wiedemann were recorded only from slaughter houses. In addtion, Sarcophaga dux Thompson is recorded for the first time from Jazan during the present investigation. For accurate location of sampling sites, details of the selected area such as longitude, latitude and altitude were computed using the global positioning system (GPS).