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The Nature Conservancy in Delaware

The sun rises over the ocean in Rehoboth Beach.

The sun rises over the ocean in Rehoboth Beach creating an orange reflection in the water.
Delaware Coast The sun rises over the Delaware Coast, an important ecosystem for several iconic species like red knots and horseshoe crabs. © C Louis/iStock

Preserving Nature in Delaware

Since 1990, TNC has worked with government agencies, private corporations, conservation organizations and our members in Delaware to protect the places on which people and wildlife depend.

Stories in Delaware

The sun sets over the Delaware Bay creating an orange reflection in the water.

Delaware's Coastal Resilience Roadmap

Explore how we are creating a resilient future for Delaware’s coastline.

A green, brown, and white spotted butterfly sits on a cluster of small white flowers.

10 Amazing Rare Species Found in Delaware

Thanks to TNC's land protection projects and ongoing conservation efforts, Delaware has witnessed the return of several rare and endangered species. Discover 10 rare species spotted in Delaware.

Six horseshoe crabs sit on top of a pile of green seaweed that has washed up onto a sandy Delaware Bay beach.

Horseshoe Crabs in the Delaware Bay

Learn how the iconic Horseshoe Crab plays an essential role in the health of our coastal ecosystems in Delaware, and beyond.

Close up view of a pile of garbage. Discarded cans, glass bottles and plastic milk jugs and soda bottles are scattered across a thick pile of sticks, logs and broken wood.

Eight Ways to Reduce Waste

Eight Ways You Can Reduce Waste In Your Life and Home.

VIEW MORE ITEMS

More from Delaware

Learn more about our team and TNC's work across Delaware

Our Staff: Experts in Action

Meet some of the people who are working to create lasting solutions in Delaware and around the world.

Contact Us

Contact our team of 50+ staff members dedicated to making a difference in Delaware.

Volunteer With Us

There is more than one way to volunteer for TNC in Delaware. Find upcoming events and ongoing volunteer opportunities.

Latest Newsletter

Download our latest newsletter featured in the Summer 2025 Nature Conservancy magazine.

Keep Learning

Explore our publications and watch highlights from our presentations and webinars.

Research/Special Requests on TNC Preserves

Click here to apply for permission to conduct research or another special activity on a TNC Preserve.

Several Horseshoe crabs pile on top of one another in shallow water.
Horseshoe Crab Count Knowing how many horseshoe crabs there are helps fishery managers develop effective policies for managing populations. © John Hinkson/TNC

2024, A Year of Conservation Results.

2024 was an important year for conservation. Explore some of our conservation wins and projects in Delaware.

Explore Our 2024 Results
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Upcoming Events

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An aerial photo of a a forest with a dirt path in the center.
Ponders Tract Ponders Tract provides 908 acres of connected and resilient habitat for species in Delaware. © The Nature Conservancy

Places We Protect

From forests to the coastline, explore our nature preserves across the state of Delaware.

Find a Preserve Near You
The sunsets over the Delaware Bay.
The Delaware Bayshore Rich in tradition and natural beauty, the Delaware Bayshore holds a proud history of families living, working and recreating along the coast. © Deb Felmey