| Northeast Ohio Regional Sewer District
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| Northeast Regional Ocean Council
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| Northeast River Forecast Center
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| Northeast States for Coordinated Air Use Management
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| Northeastern Regional Association of Coastal Ocean Observing Systems
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| Northern Arizona University | Institute for Tribal Environmental Professionals | Environmental Education Outreach Program
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| Northern Arizona University | Institute for Tribal Environmental Professionals
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| Northern Arizona University | Institute for Tribal Environmental Professionals | Climate Program
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| Northern Colorado Water Conservancy District
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| Northern Great Lakes Visitor Center
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| Northern Gulf Sentinel Site Cooperative
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| Northern Institute of Applied Climate Science
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| Northern Rockies Adaptation Partnership
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| Northland College
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| Northwest Arctic Borough
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| Northwest Arctic Borough School District
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| Northwest Boreal Partnership (Formerly Landscape Conservation Collaborative)
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| Northwest Climate Resilience Collaborative
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| Northwest Energy Efficiency Alliance
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| Northwest Fisheries Science Center: Ocean Acidification Research
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| Northwest Indian Fisheries Commission
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| Northwest River Forecast Center
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| NorWeST Regional Database and Modeled Stream Temperatures
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| Notre Dame Global Adaptation Initiative (ND-GAIN)
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| NPS Apostle Islands National Lakeshore
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