Although the concept of the blue economy is relatively new, the European Union is already taking steps to make it a reality. Therefore, it is necessary to determine the scope of activities that should be carried out for the sustainable development of the blue economy in Poland. It was decided to analyze basic data and indicators to verify whether the Polish maritime and coastal economy meets the goals of the blue economy. During the research, it became apparent that inaccuracies in terminology affect the selection of indicators. Therefore, the definitions and classification of sectors related to the blue economy were verified. Based on the literature review and the available data, the Polish maritime and coastal economy has considerable potential to be transformed into a blue economy. However, major barriers have also been identified, the removal of which requires a systematic approach. Furthermore, the benefits and costs associated with the transformation are highlighted.