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United States

The Nature Conservancy in Maryland / DC

A common blue damselfly on a trig
Damselfly Common blue damselflies can be found throughout Maryland

Make a Difference in Maryland and DC

From Western Maryland's Central Appalachian forests to our nation's capital and beyond to the Chesapeake Bay, we're working to deliver large-scale, science-based conservation that will help people and nature adapt to a changing climate.

Donate to Our Chapter Why Donate to TNC?

Our Conservation Priorities

Learn more about our conservation efforts across the region and ways that you can connect with nature.

Our Stories

SOAR program purchases oysters from growers for reef restoration

Jul 16, 2025

A group of people planting a tree.

Baltimore’s Turner Station Neighborhood Gets New Tree Planting and Public Art Installation

Holly Sims, Climate Policy Intern with the MD/DC Chapter

Reflecting on a Different Coastal Summer

By Holly Sims | Aug 2024

TNC Staff in newly acquired 97 acres in Maryland

TNC in Maryland Acquires 97 Acres Near Potomac State Forest

Sep 23, 2024

A rain garden winds through a cemetery next to a road. The garden is full of pollinator-friendly plants.

Ten Years in, D.C.'s Stormwater Credit Market is Thriving and Still Growing

Jul 16, 2024

VIEW MORE ITEMS
Cranesville Swamp Boardwalk through the wetlands of The Nature Conservancy's Cranesville Swamp Preserve. © Kent Mason

Explore our Preserves

Visit our preserve page to connect with nature and explore our protected areas in Maryland and DC.

Learn More
A aerial view of the City of Baltimore
Baltimore coastal resilience Aerial view of Curtis Bay in South Baltimore. © Yazan Aboushi

Conservation News

Explore conservation highlights from across Maryland and DC as featured in Nature Conservancy magazine's Summer 2025 issue.

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Aerial view of a small coastal community. A four-lane divided road runs through the center of the downtown commercial area surrounded on three sides by the waters and marshes of the Chesapeake Bay.

Assessing Nature's Role in Resilience

Learn how TNC and partners are working together to understand how nature can help protect coastal communities from storm and flood impacts as sea levels rise. (4:16)

Watch Video
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Upcoming Events

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Maryland/DC Staff Picture Group picture of Maryland/DC Staff © TNC/Morgan Johnson

Our Staff: Experts in Action

Our world faces complex conservation challenges. Meet some of the people who are working to create lasting solutions.

Our Staff
A report cover with the title "2024 Annual Impact Report" features an egret taking flight.
MDDC 2024 Annual Report cover MDDC 2024 Annual Report cover © TNC

Impact Report

Thanks to your support, we accomplished so much in 2024. We look forward to doing more throughout the year to come!

Impact Report