The following organizations have provided content and guidance in support of the National Maritime Digital Library
- Census of Marine Life (CoML)
- Fellows of the G. W. Blunt White Library
- History of Marine Animal Populations (HMAP) project
- Mariners Museum
- Mystic Seaport
- New Bedford Whaling Museum
- Peabody Essex Museum
- United States Merchant Marine Academy
- University of Connecticut
- University of New Hampshire
- World Whaling History