OneShoreline is the San Mateo County Flood and Sea Level Rise Resiliency District, California's first independent government agency created to address the impacts of climate change across jurisdictional boundaries.

OneShoreline works throughout San Mateo County to advance resilience to sea level rise, extreme storms, drought, erosion, and groundwater rise for developed, natural, and recreational areas, and to plan land use and infrastructure for both current and future climate-driven conditions.

Towards these ends, OneShoreline works with local governments, state agencies, scientific and educational institutions, asset owners, community-based organizations, the private sector, and the public to use the best available science and public and private resources to deliver multiple benefits equitably to people, ecosystems, and the economy.