In the context of the preparation and adoption of the new national forestry policy of the Republic of Croatia, it is important to prudently determine the position and priority goals and measures related to forest biomass. At the same time, the issue of forest biomass should be formulated in such a way that social, economic and ecological aspects are optimally harmonized while taking into account global and European programs related to the role of forests and forestry in achieving economic and environmental goals and contributing to the preservation of biodiversity. In order to determine the most acceptable concept of using forests and forest land in Croatia, as a key resource in the production of forest biomass for energy purposes, research was conducted using the Delphi method. Through two rounds of testing, the views and opinions of selected experts, involved in creating policies, production and use of forest biomass, were collected. In the first round of research, 58 respondents expressed their opinions on 15 questions grouped into 4 units: (i) general reflection on the future development of the forestry sector and the increase in the use of forest biomass for energy purposes and the related impact on forestry; (ii) possible planned increase in production (full-time) of biomass based on development guidelines; (iii) increasing the production of forest biomass by applying top-quality, energetically and environmentally optimal technologies and methods of wood harvesting, and changing the way of management of stumps, and (iv) increasing the production of forest biomass by raising crops of short rotations. Following the findings of the first round, six new questions were defined in the second round, which were answered by 40 respondents, and their answers are a key guide in formulating the issue of forest biomass when including it in the future national forestry policy. The findings of the study show that forest biomass can provide multiple positive effects at the national level, but also at the regional and local level, where it can be a strong lever for the development of rural areas. The overall social and economic effects of the potential and realized energy use of forest biomass are an important criterion for choosing the method of forest management and the type/form of its use. The volume of available biomass, its spatial distribution and the technology of obtaining commercial forms of forest biomass have an important influence on the economic aspects of using forest biomass for energy purposes, where the economic effects are directly dependent on the subsidy system and crediting model. In order to achieve the right measure of the issue of forest biomass in the structure of the national forestry policy, a holistic approach should be applied in the document preparation process, which implies the participation of a wide range of interested parties, respect for the principles of the participatory process, and professionally moderated intersectoral dialogue with strict implementation of process monitoring and evaluation.