With eleven years left to achieve the ambitious goals of the 2030 Agenda, how close are OECD countries to reaching the SDGs? And how is our understanding constrained by targets and indicators that still cannot be measured? The OECD Measuring Distance to the SDG Targets Study aims to help member countries assess where they stand now and to identify the areas where additional effort is required in order to achieve the goals. It also sets out the statistical agenda – showing how much we do not yet know, and how this might impact both the achievement of the SDGs, and decisions about what to prioritise across this vast agenda. The methodology underlying the Study also provides a way for OECD countries to understand their SDG achievements and challenges in a comparative context.