Illinois Environmental Organizations

Alliance for the Great Lakes

Working to protect the Great Lakes for today and tomorrow

Barrington Area Conservation Trust

Preserving our community’s rare and exceptional open spaces for current and future generations.

Center for Neighborhood Technology

Sustainable Communities, Attainable Results

Champaign County Audubon Society

A local chapter of the Audubon Society

Chicago Bird Alliance

Birds. Wildlife. Habitat.

Chicagoland Environmental Network

Where Green Things Happen

Chicago Ornithological Society

Providing friendly and fun opportunities for birders to enjoy

Chicago Parks Foundation

Seeing the Parks through the eyes of the Community.

Chicago Wilderness

Dedicated to protecting nature and enriching life

Citizens for Conservation

Dedicated to the preservation and restoration of the natural environment that once covered northeastern Illinois.


Protecting Our Bluffs in Monroe, Randolph, and St. Clair Counties.

Climate Action Evanston

Working to make Evanston a more environmentally just, sustainable, and resilient community.

Conservation Foundation

Preserving and restoring natural areas and open space

Decatur Audubon Society

A chapter of the National Audubon Society

DuPage Birding Club

Birding with a Purpose

Ecology Action Center

Inspiring and assisting residents of McLean County, Illinois in creating, strengthening and preserving a healthy environment.

Environmental Defenders of McHenry County

Citizens working for a healthy environment

Environmental Education Association of Illinois

Supporting and advancing quality environmental education

Environmental Law & Policy Center

Protecting the Midwest's Environment and Natural Heritage

Evanston Environmental Assocation

Environment. Education. Awareness.

Evanston North Shore Bird Club

Devoted to birding and protecting local natural resources

Friends of the Chicago River

Making the Chicago River one of the world's greatest metropolitan rivers.

Friends of the Forest Preserves

Protecting, restoring, and promoting the forest preserves of Cook County

Friends of the Fox River

Taking action to protect and maintain the quality of the Fox River and its tributaries.

Friends of Illinois Nature Preserves

Dedicated to the Conservation and Care of Illinois Nature Preserves

Friends of the Parks

Inspires, equips, and mobilizes a diverse Chicago to ensure an equitable park system for a healthy Chicago.

Grand Prairie Friends

Preserving and restoring natural communities in east-central Illinois

Habitat 2030

Restoring nature. Building community.

Heartlands Conservancy

Investing in the Nature of Southwestern Illinois.

Illinois Audubon Society

Helping preserve Illinois flora and fauna since 1897

Illinois Butterfly Monitoring Network

Engaging citizen scientists in the process of collecting quantitative data on butterfly populations

Illinois Dunesland Preservation Society

Protecting the Nation's First State Dedicated Nature Preserve.

Illinois Environmental Council

Serving as the environmental community’s eyes, ears and voice in Springfield

Illinois Native Plant Society

Dedicated to the study, appreciation, and conservation of the native flora and natural communities of Illinois

Illinois Raptor Center

A 25 acre wildlife rehabilitation and conservation education facility

Illinois Solar Energy Association

Promoting the widespread application of solar and other forms of renewable energy

Jo Daviess Conservation Foundation

Join us in protecting the special landscape of northwest Illinois

Grand Prairie Bird Alliance

Formerly JWP Audubon, based in Normal

Lake Bluff Open Lands Association

Preservation, restoration, and education since 1981

Lake Forest Open Lands Association

Devoted to the acquisition and stewardship of our natural landscapes, and to ensuring all generations have a meaningful, lasting connection to nature and our land.

Land Conservancy of Lake County

Preserving, conserving, and managing open lands, natural areas, and ecosystems

Land Conservancy of McHenry County

Preserving the natural beauty of McHenry County since 1991

Lake County Audubon Society

Education, conservation and restoration of natural ecosystems

Liberty Prairie Foundation

Promoting the integration of healthy ecosystems and the vibrant human communities

Little Village Environmental Justice Organization

Leadership Development for the Sustainable Self Determination of Little Village.

Middlefork Audubon Society

A Vermillion County Chapter of the Illinois Audubon Society.

Natural Land Institute

Conserving land in northern Illinois

Nature Conservancy of Illinois

Preserving the Prairie State

Northwest Illinois Audubon Society

Dedicated to the cause of good stewardship of planet Earth


Conserving nature for life

Peoria Audubon Society

A chapter of the National Audubon Society

Pierce Downer's Heritage Alliance

Preserving our Natural and Cultural Heritage

Poplar Creek Prairie Stewards

Restoring natural communities in northwest Cook County, Illinois

Prairie Enthusiasts

Committed to the protection and management of native prairie and savanna of the Upper Midwest

Prairie Rivers Network

Illinois advocate for clean water and healthy rivers

Prairies Forever

Dedicated to promoting the ecological and cultural significance of the American prairie

Prairie State Conservation Coalition

An Illinois Association of Conservation Land Trusts.

Salt Creek Watershed Network

Like every drop of rain - Our every action counts

Save the Prairie Society

Saving natural areas and wildlife habitat

Sierra Club

Encompasses the entire state of Illinois and a small portion of Iowa around the Quad Cities

Southeast Environmental Taskforce

Dedicated to serving the southeast side and south suburbs of Chicago by promoting environmental education, pollution prevention, and sustainable development

Southern Illinois Audubon Society

An affiliate of the Illinois Audubon Society, headquartered in Danville.

Thorn Creek Audubon Society

A chapter of the National Audubon Society, based in Park Forest

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