The purpose of the study is to assess the level of energy supply to the population of the Eastern Europe, Caucasus, and Central Asian (EECCA) countries, taking into account their financial risk and energy efficiency for households as potential socially vulnerable consumers. The research methodology is based on three approaches to determining the energy poverty of the population, as well as the integral index of energy supply to socially vulnerable segments of the population. Based on the results of the three approaches to assessing the level of energy supply to the population of EECCA countries, it has been revealed that its critical indicators are found in Armenia, Georgia, Kyrgyzstan, Moldova, Tajikistan, Turkmenistan, and Ukraine. The multivariate analysis of variance has revealed that, in all EECCA countries, both financial risk and energy efficiency levels have a significant impact. In Azerbaijan, Kazakhstan, and Russia, financial risk has the greatest impact on the level of energy supply to socially vulnerable segments of the population, while in other EECCA countries the energy efficiency factor has the strongest impact. In a number of EECCA countries, households have poor energy supply and require efficient and reliable operation, the introduction of energy-efficient technologies for home maintenance, and the improvement of related programs. The novelty of this study lies in the proposed methodological approach to assessing the supply of energy resources to socially unprotected segments of the population, which makes it possible to determine the impact of financial risk and energy efficiency in EECCA countries.