Encyclopedias, Almanacs, Transcripts, and Maps
- National Lakeshore
- National Mining and Minerals Act (1970)
- National Parks and Conservation Association
- National Pollutant Discharge Elimination System
- National Priorities List
- National Recycling Coalition
- National Research Council
- National Seashore
- National Wildlife Federation
- National Wildlife Refuge
- Native American Christianities
- Native American Science
- Native Australians
- Native Landscaping
- NATO alphabet
- Natural Disasters of the Millennium
- Natural Gas, Consumption of
- Natural Gas, Processing and Conversion of
- Natural Resources Defense Council
- Nature Conservancy, The