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Renewable energy sources (RES) play a key role in achieving the European Union's energy and climate objectives. As a member of the European Union, Croatia has committed to adopting European Directive 2009/28/EC, a directive on promoting the use of RES. Croatia shows good potential for the use of different types of RES. In the period 2009–2019, the share of renewable energy in energy consumption increased from 23.6 to 28.5 percent. The Croatian energy strategy aims to increase the national share of renewable energy to at least 32 percent by 2030. Acceptance and public support are essential for renewable energy to be introduced into energy policy and particularly to encourage renewable energy implementation in the residential sector. The purpose of the paper is to explore the public perception of renewable energy and citizens' willingness to pay for the use of RES. Data were collected through a 2021 survey of citizens 18 years and older. The survey results show a low level of implementation of RES technology in the residential sector; more than 80 percent of respondents did not use any sources of renewable energy in their households. Results related to respondents' knowledge of different sources of renewable energy suggest they have the most knowledge of solar, wind, and hydropower energy. Respondents believe that combating climate change, reducing dependency on energy imports, reducing environmental impacts, and improving health are the most important benefits of RES implementation. The survey reveals general support for RES among respondents; almost 89 percent of them would purchase renewable energy from local suppliers. In addition, 79 percent of survey participants were willing to pay for the introduction of RES technology into their households. The research shows that environmental concerns are the primary reason for citizens' higher willingness to pay for RES. [ABSTRACT FROM AUTHOR]