| National Institute of Standards and Technology | Metrics and Tools for Sustainable Buildings
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| National Integrated Heat Health Information System
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| National Interagency Fire Center
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| National Interagency Fire Center | National Interagency Coordination Center
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| National League of Cities
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| National Marine Protected Areas Center
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| National Park of American Samoa
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| National Parks Foundation
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| National Recreation and Park Association
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| National Snow and Ice Data Center
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| National Snow & Ice Data Center
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| National States Geographic Information Council
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| National Syndromic Surveillance Program
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| National Weather Service
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| National Weather Service | Alaska Region
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| National Weather Service | Central Region
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| National Weather Service | Forecast Office New York, NY
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| National Weather Service | National Operational Hydrologic Remote Sensing Center
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| National Weather Service | El Paso
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| National Weather Service River Forecast Centers
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| National Weather Service | Southern Region
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| National Weather Service | Weather Forecast Office Guam
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| National Wildlife Federation
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| Native Village of Kivalina
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| Native Village of Newtok
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