Marine Habitats

Enhancing management of ocean ecosystems that extend across state borders

Water Quality

Advancing regional-scale efforts for healthy, clean ocean waters

Climate Change Adaptation

Understanding impacts on marine ecosystems, coastal communities and economies

Renewable Energy

Planning for sustainable and compatible wind power in offshore waters.


MARCO is the Mid-Atlantic Regional Council on the Ocean, formed in 2009 by a governors’ agreement among New York, New Jersey, Delaware, Maryland, and Virginia.

MARCO Partnership Opportunities

MARCO’s 2022 – 2024 Work Plan

Mid-Atlantic Ocean Data Portal

The Portal is an ocean planning resource center featuring the Marine Planner, an interactive mapping tool.

Check out the latest Portal News & Updates!

Mid-Atlantic Ocean Planning Committee

The Mid-A OPC is a committee established by MARCO to foster collaboration among states, federal agencies, the Mid-Atlantic Fishery Management Council, and federally recognized tribes, and to engage stakeholders.

Upcoming MARCO Events & Webinars

An image of a tidal marsh at sunset with text reading: Mid-Atlantic Ocean Conservation Summit October 1-3, 2024 Monmouth University West Long Branch, New Jersey

The Mid-Atlantic Ocean Conservation Symposium

Mark your calendars for Oct. 1-3 and join us at Monmouth University. CLICK HERE for more event details.

Recent MARCO Events & Webinars

How Tuesday Webinar: Intro to the MARCO Portal


Watch our June 25 tutorial on the Mid-Atlantic Ocean Data Portal’s thousands of map layers, tools and features.
Flyer reading: Online Webinar<br />
Chesapeake Carbon and Alkalinity Study<br />
Understanding the role of macrobiota in estuarine carbon and alkalinity dynamics in the Potomac River Estuary and the York River Estuary<br />
Raymond Najjar<br />
Pennsylvania State University<br />
April 24, 2024

Chesapeake Carbon & Alkalinity Study Webinar


On June 26, Dr. Raymond Najjar of Pennsylvania State U. provided an overview of research focused on the role macrobiota play in estuarine carbon and alkalinity dynamics.

The Sixth Annual Mid-Atlantic Ocean Forum

Thanks to all who participated in this year’s event. Check back soon for videos of the panels and presentations.

MARCO Webinar: A dive into Sea Turtle Research Planning in Support of Impact Assessment for US Atlantic Offshore Wind


The MARCO Ocean Conservation Work Group hosted a webinar with a featured presentation by Dr. Susan Barco highlighting recommendations from the Sea Turtle Chapter of the Regional Wildlife Science Entity Science Plan.

A diagram illustrating how ocean acidification occurs

MACAN Educational Video Series

This four-part series will introduce you to the sources of coastal and ocean acidification, its impacts on coastal habitats, fisheries, and livelihoods, and the technology scientists are developing to monitor acidification and remove carbon dioxide from the ocean.

Woman and Child on Beach

Statement on Diversity, Equity, Inclusion, Justice, Accessibility

The Mid-A OPC is committed to listening and incorporating information from the widest possible set of stakeholders to better understand and address injustices and inequities. The committee will ensure its work reflects a commitment to Diversity, Equity, Inclusion, Justice and Accessibility (DEIJA), as well as addresses the needs of stakeholders from a variety of backgrounds and industries.