"The Champaign County Forest Preserve District is a local, property tax-supported government agency charged with the stewardship of seven forest preserves covering over 4,000 acres in Champaign County, Illinois."

"We are a regional collaborative of hundreds of partner organizations and individuals working to implement landscape-scale approaches to conservation in and around the southern shores of Lake Michigan including members from Southeast Wisconsin, Northeast Illinois, Northwest Indiana, and Southwest Michigan."

"Founded in 1972, The Conservation Foundation is one of the region’s oldest and largest not-for-profit land and watershed conservation organizations dedicated to preserving and restoring open space, protecting rivers and watersheds and promoting stewardship of the environment in northeastern Illinois."

"The EAC acts as a central resource for environmental education, information, outreach, and technical assistance in McLean County, Illinois as the nonprofit environmental sustainability agency."

"Grand Prairie Friends is a volunteer-driven, not-for-profit, conservation organization and land trust composed of people from many walks of life who share a commitment to preserve and restore tallgrass prairie and woodlands in east-central Illinois."

"To manage, conserve and protect Illinois' natural, recreational and cultural resources, further the public's understanding and appreciation of those resources, and promote the education, science and public safety of Illinois' natural resources for present and future generations."

This University of Illinois guide includes a list of links to Forest Preserve districts in the state of Illinois.

The Nature Conservancy is a well known conservation organization working around the world to protect ecologically important lands and waters for nature and people. The Nature Conservancy's projects include restoration sites in the state of Illinois.

"Founded in 1963, Openlands protects the natural and open spaces of northeastern Illinois and the surrounding region to ensure cleaner air and water, protect natural habitats and wildlife, and help balance and enrich our lives."

"The ParkLands Foundation is a private, nonprofit organization founded in 1967 to protect, restore, and manage natural lands in the Mackinaw River watershed of Central Illinois—primarily in McLean and Woodford counties...These lands are dedicated primarily for preserving the biological diversity of the native plants and wildlife, and secondarily for passive public recreation, environmental education, and scientific research."

"PRN has consistently used grass roots organizing and advocacy to protect the rivers and streams of Illinois. From the successful opposition of dams proposed in the 1970’s that would have permanently altered the flow of our rivers, to our current efforts to ensure full enforcement of the Clean Water Act to reduce water pollution and protect fish and wildlife habitats, PRN works with local citizens to advocate for the protection of our rivers at the federal, state, and local level."

"Red Bison focuses on practicing restoration ecology throughout native Illinois landscapes in Champaign-Urbana. We maintain local grasslands and forests by controlling invasive species, promoting native species, performing prescribed burns, and learning more about native wildlife."