Antimicrobial resistance is a major threat to health and human development, affecting our ability to treat a range of infections. Treatments for a growing number of infections have become less effective in many parts of the world due to resistance. The link between antimicrobial resistance and use of antimicrobials is well documented. However, little information is available on antimicrobial use in low-income countries. This report presents 2015 data on the consumption of systemic antibiotics from 65 countries and areas, contributing to our understanding of how antibiotics are used in these countries. In addition, the report documents early efforts of the World Health Organization (WHO) and participating countries to monitor antimicrobial consumption, describes the WHO global methodology for data collection, and highlights the challenges and future steps in monitoring antimicrobial consumption.