Participants in our Aquaculture Business Development tour Bangs Island Mussels during the Industry Day event in December 2019.

The Island Institute is a membership-based organization working to sustain Maine's island and coastal communities, and exchange ideas and experiences to further the sustainability of communities here and elsewhere. We are supported by over 3,000 members around the world who share our commitment to the future of Maine's islands and coast.

Membership levels and benefits

Benefits of membership include:
Membership support levels:
  • Year-round island resident — $ 25
  • Senior & Student — $ 30
  • Crew — $50
  • Bosun — $100 
  • First Mate — $250
  • Skipper — $500

Join or renew a membership here

Island Institute Giving Circles

The Island Institute is proud to recognize our most generous donors through the Island Partners giving circles. Although valuable support comes in many forms, the philanthropic leadership of our Island Partners has a significant impact on our ability to deliver on our mission.

Island Partner Giving Circles
  • President's Circle — $25,000+
  • Anchor — $10,000–$24,999
  • Waypoint — $5,000–$9,999
  • Compass — $1,000–$4,999
In Honor of Your Commitment

Island Partners receive all Island Institute member benefits, plus:

  • Opportunities to connect with Island Institute staff, board of trustees, and community leaders at unique Island Partner events
  • Communications directly from President Rob Snyder on important issues

All gifts made to Island Institute operating, program, or endowment funds will be credited toward Giving Circle membership for the fiscal year (July 1–June 30) in which they are received. Unless they request to remain anonymous, Island Partners may be recognized in select Island Institute print materials.

Business Memberships

Our business members are waterfront innovators! Business members support our programming and help strengthen island and coastal economies, enhance education and leadership opportunities, and partner with us to deliver and share solutions for sustainable communities. If you are a registered business, corporation, or a nonprofit organization, consider supporting our work through an Island Institute Business Membership. 

Click here for a full list of membership levels and benefits

For more information on a business membership, please email or call (207) 594-9209, ext. 113.

Gift Membership

Share your love of Maine’s island and coastal communities with a friend or family member with a gift of membership. Your recipient will be welcomed with a card featuring the photography of founder Peter Ralston and one of our signature publications, then begin receiving the member benefits listed above.

Give a Gift Membership today

Springtide Society

Monthly giving is an easy and effective way to support the Island Institute. 

By becoming a member of the Springtide Society, you'll receive all Island Institute member benefits, and join a special group of sustaining members whose monthly gifts provide steady, dependable support. This support ensures continued investment in our program areas and allows us to help Maine's island communities address the critical issues they face.

Springtide giving is easier on the environment too. All transaction confirmations will be sent to you via email. For tax purposes, we'll mail you an annual statement in January. 

Ready to help? To become a Springtide member, you simply need to register to make an automated monthly or quarterly gift in an amount of your choosing, starting at as little as $10 per month. Scheduled contributions can be made by credit or debit card, or through secure electronic funds transfer (EFT) from a checking account.

Register online here or by calling us at (207) 594-9209 x113.

Secure online transactions are processed by Blackbaud.

Set up a monthly or quarterly recurring contribution today


Call us at (207) 594-9209 or contact a member of our Philanthropy team at