The objective of this research is to find impact of foreign direct investment on manufacturing industries in Oman. The study utilized a quantitative research method which applied primary and secondary data obtained from Oman's World Bank database (1984-2018). The primary data were collected from a research questionnaire administered to 410 respondents from nine industrial sectors, namely: Textile, Petroleum goods, Electronics, Automotive, Food & Beverages, Agriculture & Fishery, Publishing, Chemicals and Pharmaceutics. The results of this study also revealed that the spillover impacts on domestic companies, like novel technology, marketing strategies, organizational skills, money, jobs, export growth, diversifying of economy and greater competition, lead to enhanced domestic market efficiency and boosted productivity in skill-spreading host economies with the highest impact accompanied with Capital and Technology spillover.