| Friends of the Prairie Learning Center: Neal Smith National Wildlife Refuge. Largest re-creation of the tallgrass prairie ecosystem in the U.S. Also environmental education. |
| Grand Prairie Friends: Illinois nonprofit agency committed to protecting tallgrass prairie. |
| Save the Prairie Society: Sponsors tours and activities as an educational service, land acquisition, volunteer land management to protect prairie. |
| Tallgrass Prairie National Preserve (NPT): A "Prairie Partnership" between National Park Trust (NPT) and National Park Service (NPS)to preserve Tallgrass Prairie. |
| The Prairie Enthusiasts: Dedicated to the inventory, promotion, restoration, and protection of natural prairies in the Upper Midwest. Includes conference information, discussion area, news articles, and information about prairie flora and fauna. |
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