Abstract: Owing to the importance of sandflies in the transmission of cutaneous Leishmaniasis in Al-Gassim Region, Saudi Arabia, this study was carried out. The main objective was to describe the prevalence and distribution of sandflies and their susceptibility to insecticides used in three different areas in the region. Castor oil coated paper traps and insect collecting aspirators were employed in sampling three different environments in three selected sites in Al-Gassim, for two seasons. Two pyrethroid-based insecticides, Scidco Fog (0.54% permethrin +0.15% S-Bioallethrin +0.75% piperonyl butoxide) and Aralin (2% tetramethrin +11% cypermethrin +18% piperonyl butoxide) were used for sandfly control, for two active seasons. The results of the study indicated that only one species of sandflies, Phlebotomus papatasi, predominates in the region and that 38.7 and 36.5% of all the insects collected were in farms and primitive houses, respectively. The performance of Scidco Fog was superior over Aralin, their effect was 91.9 and 81.1%, respectively.