The aim of the research presented in this paper is to assess the competitive potential of Polish agriculture (potential competitiveness) and the competitive position of the Polish agri-food sector on the Single European Market (SEM) with reference to the global context. The conducted research has proven that Polish agriculture, while having significant production potential (potential competitiveness) on a European scale, is at the same time characterized by the significant structural deficiencies of this potential, which may adversely affect he competitive position of Polish agriculture in the future. Poland’s inclusion in the SEM area and the adoption of the rules of the Common Commercial Policy resulted in the creation and diversion of trade in agri-food products, and the comparative advantages achieved on the SEM became a source of favorable export specialization, allowing for relatively good use of the currently existing potential of agriculture and the food industry. This has resulted in the relatively good competitive position of the Polish agri-food sector on the SEM. However, in the long term, the ability to maintain or improve competitiveness in the future will be determined by competitive potential. The Polish agri-food sector has significant potential to increase exports and strengthen its competitive position (also on non-EU markets), provided that strong foundations for the sector are built, including an improvement in competitive potential.