- Guild of Natural Science Illustrators
- Non-profit organization that sets professional standards, provides opportunities for professional and scholarly development, encourages and assists member networking.
- Society of Illustrators
- A nonprofit educational organization promoting illustration. Home of the Museum of American Illustration.
- Society of Illustrators San Diego
- Professional organization that promotes the interests of illustrators. Includes activities, resources, membership information, and samples of members' work.
- The Association of Illustrators (AOI)
- Non-profit trade association dedicated to its members’ professional interests and the promotion of illustration. Provides news, membership information, portfolios and events.
- The Illustrators' Partnership of America (IPA)
- Non-profit organization dedicated to promoting the business of professional illustration and protecting the intellectual property rights of its members.