Cincinnati Chapter of the Izaak Walton League of America
- Dedicated to protecting our nation's soil, air, woods, waters and wildlife. Provides history, links, and contact information.
- http://cinci-iwla.org/

Northside Greenspace Inc
- An all-volunteer, nonprofit organization founded to identify, preserve and restore natural areas in Northside and surrounding communities.
- http://www.northsidegreenspace.org/

Mill Creek Restoration Project
- A nonprofit organization focused on cleaning up water quality, establishing greenways, and providing environmental education in a 28-mile long urban river corridor in southwest Ohio.
- http://www.millcreekrestoration.org/

Keep Cincinnati Beautiful
- Offers a variety of community-based programs which strive to meet the changing needs of Cincinnati neighborhoods. Focusing on a community's assets, programs are selected and implemented by neighborhood organizations.
- http://www.keepcincinnatibeautiful.org/

Cincinnati Chapter of the Audobon Society
- Contains the history of the society, a calendar of events, and membership details.
- http://home.earthlink.net/~audsocohio/

Imago
- A nonprofit ecological organization that works to create ways people can live in harmony with the environment. They run a 16-acre nature preserve and offer programs for school and scout groups as well as various activities for the public.
- http://www.imagoearth.org