This document discusses the OECD's work on developing indicators for sustainable ocean economies and circular economies. It provides an overview of the OECD's Sustainable Ocean Economy Dataset, which includes integrated and modular indicators on topics such as socioeconomic opportunities, policy responses, natural capital, well-being and resilience, and environmental and resource productivity related to oceans. Examples of specific indicators are presented, such as those relating to coastal flooding exposure and policy instruments for ocean sustainability. The document also outlines the OECD's framework for monitoring circular economies and discusses dissemination of the ocean economy data through its database, reports, and website.