Abstract This article addresses the development of energy flow diagrams in the Central American region, based on the World Energy Balance of 2019. The main objective is to provide a diagnosis on energy systems efficiency, as well as the components that integrate them. This will help identify the improvement areas for energy consumption reduction. The development of the energy flow diagrams follows a model established by the International Energy Agency (IEA), categorized by topics: primary energy resources, conversion technologies, and demand sectors. Additionally, the diagrams contain energy services and energy losses, calculated through the efficiencies found for each demand sector. Seven energy flow diagrams (one for each country: Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, Panama; and one for the whole region) were developed to represent the region’s energetic outlook regarding energy efficiency, primary energy resource consumption, and final energy consumption shown by demand sectors. An estimation of greenhouse gases (GHG) emissions per country was done. This work may serve as a guide for energy planning, by tracking the energy flows to reduce energy losses and CO 2 emissions by improving the low efficiency areas.