Sound and timely data and statistics are essential for designing better policies for better lives. When the right data are available and used by policy makers, they play a crucial role in managing crises, as revealed during the COVID-19 pandemic. They are also indispensable for transparent and accountable delivery of policies and services and to guide business and investment decisions in line with the Sustainable Development Goals (SDGs). The first 2021 edition of the OECD’s Data for Development Profiles is a unique source of information and insights on how members of the Development Co-operation Committee (DAC) allocate official development assistance (ODA) to statistical capacity development and strengthening data ecosystems in low and middle income countries. By providing a comprehensive overview of members’ data and statistical policy priorities, strategies, funding, delivery modalities and partnerships, the profiles serve as a baseline for co-ordinating international support and highlight ways forward for greater impact and effectiveness.