The RAPID-EC project is an early childhood family well-being survey designed to gather essential information in a continuous manner regarding the needs, health promoting behaviors, and well-being of children and their families during the COVID-19 outbreak in the United States. The survey focuses on better understanding child development (and parents’ concerns about development over time), caregiver mental health and wellbeing, and caregiver needs and utilization of resources. RAPID-EC collects nationally representative data from caregivers in all 50 states.