The collective monograph examines the conceptual and practical aspects of ensuring the economic security of a country, region, and economic entity. Particular attention is paid to the analysis of socio-economic, demographic, financial factors to ensure economic security, as well as the role of competition and the structure of sources of business financing in ensuring the economic security of enterprises in conditions of risks and uncertainty. The results of a study of the main directions of development of the methodology for assessing economic security at macro and micro levels are presented.