The issues of the article are associated with the development of the renewable energy source (RES) sector in the world and in Poland. The subject is undoubtedly connected with the problem of the energy transformation taking place in most countries nowadays. Energy transformation processes are mainly associated with an increase in the share of energy production from RES and increased awareness of energy use by end consumers. This means that the systematic development of the RES sector is a necessary condition for linking the effective course of energy transition processes with simultaneous socio-economic development.The main objective of this study is to present the status of the RES sector in Poland against the background of worldwide development tendencies. The implementation of the objective made it possible to indicate key trends in the production and use of energy from individual RES and to assess to what extent Poland follows global trends. Poland is one of the European countries where hard coal and lignite constitute the main source of energy. On the other hand Poland, as a Member State of the EU, is obliged to implement the energy strategy within the framework of the European Green Deal, where all Member States are to become climate neutral.