The right to food is a fundamental one, and the optimization between human needs and available resources is a challenge in all countries. The main goal of this study is to find the factors that determine food security and to determine the level of food security in the Western Balkans while undergoing the process of European Union (EU) integration. In order to achieve this, four Food and Agricultural Organization (FAO) dimensions of food security are analyzed: stability, availability, access, and utilization. The Preference Ranking Organization Method for Enrichment Evaluations (PROMETHEE) method is then used to rank Western Balkan and EU countries according to food security. The results show a significant difference among these countries in terms of their levels of food security, which is a consequence of Western Balkan countries’ significant lag in economic development in comparison to the EU. Although the level of food security in Western Balkan countries is lower than in EU countries, it is not endangered. However, it can become endangered under crisis conditions (like the COVID-19 pandemic). The main reasons for this discrepancy are high food supply variability, dependence on cereal import, and lower Gross Domestic Product (GDP) per capita in these countries than in EU.