The Chesapeake Bay Foundation (CBF) is a nonprofit organization dedicated to the restoration and protection of the Chesapeake Bay and its watershed. Founded in 1967, CBF is the largest privately funded conservation group focused on the Bay, with over 216,000 members and a team of approximately 185 staff. The foundation's mission is to improve water quality and watershed productivity while ensuring a high quality of life for the region's residents.

CBF engages in various activities, including hands-on environmental education programs that connect people with the Bay. It advocates for science-based policies to reduce pollution and restore habitats, and it undertakes habitat restoration projects to improve water clarity and reduce toxic pollutants. The foundation also produces the annual State of the Bay Report, which assesses the health of the Bay, and offers educational materials to promote awareness and stewardship. CBF emphasizes community engagement and works to make its programs accessible to diverse communities, fostering a broad coalition of stakeholders committed to the Bay's health.