Martha's Vineyard Commission
- Regional land use planning agency of island. Information and resources on managed growth planning.
- http://www.mvcommission.org/

Sheriff's Meadow Foundation
- A land trust preserving land in all the islands communities. Includes event information as well as maps and trail guides.
- http://www.sheriffsmeadow.org/

Tisbury Waterways Inc.
- A non-profit organization working to protect the islands waterways. Background on projects, news and gift item sales are included.
- http://www.tisburywaterways.org/

Vineyard Open Land Foundation
- Includes mission statement, property profiles, contact list, and funding information.
- http://www.islanderis.net/users/volf/

Friends of Sengekontacket
- Organization whose mission is to protect and preserve water quality in Sengekontacket Pond. Membership information, activities and educational information are provided.
- http://www.sengekontacket.org/

Tides Around Martha's Vineyard
- Comprehensive listing from local resource.
- http://mvgazette.com/features/tides/

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.
- http://training.fws.gov/library/pubs5/necas/web_link/40_martha's%20vineyard.htm

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.
- http://www.mvshellfishgroup.org/