The paper presents the assessment results of the implementation of Poland's national sustainable development goals from 2010 to 2019. For this purpose, using taxonomic methods, a synthetic index (National Sustainability Index) was designed. The study sought answers to the following questions: What is Poland's general level of accomplishment of sustainable development goals? What were the dynamics of changes in respective years? Which goals require special attention and actions in the coming years? Considering the possible range of the NSI, a significant improvement in the accomplishment of the national sustainable development goals in Poland was observed in the surveyed years. Nevertheless, some areas still need intervention at the decision-making level, which would contribute to further balancing the paths of economic growth and development in Poland. The added value of the analyses is the synthetic measure designed based on 76 specific indicators and the evaluation of sustainable development in Poland over ten years.