Croatia and its island stakeholders have been very active on the European level in bringing to focus the agenda of the energy transition of the islands. In the past two years, the national legislation was improved by the creation of a framework for energy transition which include the islands. However, challenges to the implementation of energy transition still remain. Drawing upon the regulatory inventory of the current legislation, the Clean energy for EU islands secretariat carried out surveys and interviews with Croatian stakeholders to identify the barriers to clean energy deployment on the islands and the solutions to overcome those. These findings were discussed with all relevant stakeholders in two focus group meetings and a national stakeholder meeting (NSM). The result of that process is described in this study. The barriers identified in Croatia relate to local, regional and national energy planning, coordination and monitoring and the need for better integration of energy priorities in sectoral policies. Moreover, the need of support mechanisms tailored to islands, lengthy permitting procedures, need for involvement of island communities in energy projects and grid constrains and inflexibility came into focus as well. These barriers can be overcome through involvement of local stakeholders in energy transition, better planning, coordination and monitoring of energy policy on local and regional level, European-wide islandsto-islands exchange of best practices and leadership by the relevant authorities.