- Conservation Law Foundation of New England is a regional environmental advocacy organization working on the most significant threats to the natural environment of New England and to the health of its residents.
- Harvard Forest Harvard Forest serves as a base for research and education in forest biology, focusing on silviculture and forest management, soils and the development of forest site concepts, the biology of temperate and tropical trees, forest ecology and economics and ecosystem dynamics.
- The Massachusetts Audubon Society is the largest conservation organization in New England working to preserve the natural world through conservation, education and environmental advocacy.
- Massachusetts Association of Conservation Commissions MACC is a private, non-profit 501(c)(3) organization incorporated in the Commonwealth. Our mission today continues to be education of and support for Conservation Commissions
- The Massachusetts Chapter of the Society for Conservation Biology is dedicated to promoting the scientific study of the phenomena that affect the maintenance, loss, and restoration of biological diversity.
- Massachusetts Clean Water Action is a citizens’ organization working for clean, safe and affordable water, prevention of health-threatening pollution, creation of environmentally-safe jobs, and business, and empowerment of people to make democracy work.
- Massachusetts Land Trust Coalition is an informal association of land trusts and conservation organizations in Massachusetts, working to increase their effectiveness with the legislature and government agencies.
- MassPIRG MassPIRG (Massachusetts Public Interest Research Group) is a nonprofit, non-partisan organization dedicated to serving as a watchdog for the state’s citizens and environment.
- Metacomet Land Trust is a non-profit conservation organization dedicated to the protection of open space and natural resources in the communities of South Central Massachusetts.
- Mount Grace Land Conservation Trust protects significant natural, agricultural, and scenic areas and encourages land stewardship in North Central and Western Massachusetts for the benefit of the environment, the economy and future generations.
- The New England Botanical Club is a nonprofit organization that promotes the study of plants of North America, especially the flora of New England and adjacent areas.
- The New England Wild Flower Society is the oldest plant conservation organization in the United States, promoting the conservation of temperate North American plants through key programs.
- Sierra Club, Massachusetts Chapter is a nonprofit member-supported, public interest organization that promotes conservation of the natural environment by influencing public policy decisions.
- Trustees of Reservations the nation’s oldest private, statewide conservation and preservation organization. Since 1891, they have protected over 34,000 acres of
land in Massachusetts, including 89 public reservations representing many of the state’s most scenic, ecologically rich, and historically important landscapes. - Valley Land Fund is a regional land trust serving Hampden, Hampshire,and Franklin Counties, working cooperatively with smaller and larger conservation organizations, towns, neighborhood groups, and state agencies to protect the special places of the Connecticut River Valley. and surrounding hills.