Seasteading means building floating societies with significant political autonomy.

Nearly half the world’s surface is unclaimed by any nation-state, and many coastal nations can legislate seasteads in their territorial waters.

The Seasteading Institute is a nonprofit think-tank.

We promote the creation of floating ocean cities as a revolutionary solution to some of the world’s most pressing problems: rising sea levels, overpopulation, poor governance, and more…


Ecotopia Book Club

New to Seasteading?

What about tsunamis? Can I afford it? Who will govern? We answer your questions with short videos.

The First Seastead

The dawn of the age of Seasteading began on February 3, 2019, when Ocean Builders achieved an engineering feat and an environmental feat. They proved that a single-family seastead can float stably in international waters for less than the cost of the average American home and they achieved a tremendous biodiversity breakthrough.

Our Book

The most complete account of the cutting-edge research and the visionaries making it happen.

Seastead Swag!

Support The Seasteading Institute and adorn yourself with seasteading t-shirts, towels, hoodies, phone cases, water bottles and notebooks in our merchandise shop.

anarchapulco conference acapulco

Get Involved

Stay connected with the global seasteading community!

Active Projects

Several Seasteading projects are already under way! Get the latest news here.

Read, Watch, Listen

Do a deep dive into the world of Seasteading through our blog, our podcast, and our extensive video series.