U.S. Protected Areas Resources
- USGS Gap Analysis Program (GAP)
- NBII
- Conservation Biology Institute - Protected Areas Database (CBI Edition)
- LandScope America
- Private Landowner Network - Online catalog of state by state grant and related funding opportunities for land protection, stewardship and enhancement
Global Resources
- UNEP World Conservation Monitoring Center - World Database of Protected Areas
- IUCN - World Commission on Protected Areas
- IUCN Protected Area Management Categories