This paper deals with the potential of renewable energy resources in Timor-Leste (TL). Although other renewable energy sources are mentioned in this article such as wind energy, solar energy, hydropower, bioenergy including bioethanol and biogas, this study is mostly concerned with the potential of biomass available in the country. Our main goal is to gather the data regarding to the renewable energy resources in TL and provide such data as useful information for a wide range of end-users. The current evaluation is based on various sources which include previous assessments and the contribution of GIS based techniques. The energy potential of biomass in TL apart by vegetation or flora and animals can also be obtained from agricultural waste such as waste from rice, corn, and coffee. Regarding the forestry based resources, the highest concentration of plant biomass associated with tropical forests is found in upland areas and also in areas with medium and low forest density. The analyses also include the contribution of agricultural waste and that from urban waste. The results from this article show that Timor-Leste has a wide potential of renewable energy such as wind energy, solar energy, hydropower, bioethanol, biogas, and biomass.