This study aims to shed light on the impact of economic feasibility studies on the success of small and medium enterprises in the Governorate of Muscat in the Sultanate of Oman. Economic feasibility studies and the extent of the success of small and medium enterprises in the Governorate of Muscat in the Sultanate of Oman. The study population consisted of all entrepreneurs who own small and medium enterprises in the Governorate of Muscat in the Sultanate of Oman. A random sample of them with a size of (1000) from the owners of these enterprises was selected. An electronic questionnaire was distributed On the study sample, from which (111) were recovered. The results of the study sample analysis on the impact of the economic feasibility study on the success of small and medium enterprises in the Governorate of Muscat in the Sultanate of Oman, as there is an impact of economic feasibility studies on the success of small and medium enterprises, where the average of the study sample estimates about the impact of the economic feasibility study on the success of small and medium enterprises in The Sultanate of Oman, where the overall average of the scale was (3.56), with a very good application degree. In light of the findings of the study, the researcher presents several recommendations that will contribute to improving and developing economic feasibility studies, as well as promoting and developing the success of small and medium enterprises in the governorate. Muscat, Sultanate of Oman Keywords: economic feasibility studies, small and medium enterprises, support.