As of September 5, 2007, the No Child Left Inside Coalition is comprised of 58 organizations, representing 10.2 million members!

• American Recreation Coalition
• American Trails
• American Society of Landscape Architects
• Anza-Borrego Foundation and Institute
• Appalachian Mountain Club
• Association of Nature Center Administrators
• Association of Zoos and Aquariums
• Audubon Naturalist Society
• Back to Natives Restoration
• Chesapeake Bay Foundation
• Children and Nature Network
• Coalition for Community Schools
• Connecticut Forest and Park Association
• Council for Environmental Education (Project WILD, Flying WILD)
• Eaglemont
• Earth Day Network
• Earth Force, Inc.
• Frontrange Earth Force (Denver)
• Delaware Valley Earth Force (Philadelphia)
• Suncoast Earth Force (Tampa/St. Petersburg)
• Low Country Earth Force (Charleston)
• Lake Erie Earth Force (Erie)
• Environmental Education Association of Illinois
• Environmental Education Council of Ohio
• Environmental Resource Center
• Heal the Bay
• Hooked on Nature
• Kokua Hawai'i Foundation
• Leopold Education Project
• Living Classrooms Foundation
• Mass Audubon
• National Association of Interpretation 
• National Audubon Society
• National Council for Science and the Environment
• National Education Association
• National Marine Sanctuary Foundation
• National Recreation and Park Association
• National Science Teachers Association
• National Service-Learning Partnership
• National Wildlife Federation
• Natural Science Collaborative
• North American Association for Environmental Education
• Pheasants Forever and Quail Forever
• Project Learning Tree
• Rhode Island Environmental Education Association
• Rhode Island Zoological Society /Roger Williams Park Zoo
• Save San Francisco Bay Association
• Save The Bay
• Second Nature
• Sierra Club
• Teatown Lake Reservation
• The Conservation Fund
• The Corps Network
• The Ocean Project
• The Wilderness Society
• Valley Forward Association
• Wildlife Conservation Society
• Youth Service America