The ASER Health Report summarises ASER Centre’s work to extend the ASER approach to the health and nutrition sector. ASER Health aims to provide independent, reliable and action-oriented data for the health and nutrition sector, helping to bridge existing information gaps and contribute towards the achievement of good health and well-being for all. The approach was developed iteratively and implemented in district-level surveys in Sambalpur (Odisha) and Udupi (Karnataka) in India. This survey approach is rapid, citizen-led and cost-effective, making it easily scalable.