The iron and steel sector, which provides inputs to a variety of sectors such as construction, automotive, defense, white goods and shipbuilding is one of the vital sectors for developing countries in particular. Determining the international competitiveness of the iron and steel sector is very important in terms of the future of the industry in developing countries, including Turkey. This study aims to determine the international competitiveness of the Turkish iron and steel industry by using the Revealed Comparative Advantage method. In the study, competitiveness of the Turkish iron and steel sector for the period 2007- 2016 has been determined on the basis of three-digit sub-sector. For this purpose, the indices developed by Balassa and Vollrath was calculated separately and compared with each other. As a result of the study, it has been determined that the competitiveness of the iron and steel sector in the group of flat products used in the production of high value added products is low, whereas in the group of long products, the sector is highly competitive. The main reason for this is the inadequate production of flat products. Technology and infrastructure facilities of Turkey iron and steel industry are adequate for the production of flat products. Although the flat product production capacity has increased in recent years, not all of this capacity can be used. The highest competitive product group of Turkey iron steel sector against the world is the long products. However, the added value of long products is lower than that of flat products. To increase its competitiveness in the global market of Turkey's iron and steel industry, efficient use of available resources and to put in domestic energy sources is very important. R & D studies should be carried out to shift the production from long products to flat products and new production techniques and new products should be developed. High taxes and other financial liabilities that increase costs in the sector should be alleviated and government incentives should be increased, especially in the production of high added value products.