Friends of Sengekontacket: Organization whose mission is to protect and preserve water quality in Sengekontacket Pond. Membership information, activities and educational information are provided.
Martha's Vineyard Commission: Regional land use planning agency of island. Information and resources on managed growth planning.
Martha's Vineyard Shellfish Group: Nonprofit consortium of Shellfish Departments on Martha's Vineyard which strives to preserve and expand the island's traditional shellfisheries.
Northeast Coastal Areas Study Significant Coastal Habitats: Martha's Vineyard Coastal Sandplain and Beach Complex: Project map, general habitat description, signifiance and uniqueness of area, environmental threats and conservation considerations, from the EPA's National Estuary Program.
Sheriff's Meadow Foundation: A land trust preserving land in all the islands communities. Includes event information as well as maps and trail guides.
Tides Around Martha's Vineyard: Comprehensive listing from local resource.
Tisbury Waterways Inc.: A non-profit organization working to protect the islands waterways. Background on projects, news and gift item sales are included.
Vineyard Open Land Foundation: Includes mission statement, property profiles, contact list, and funding information.