Coastal Conservation Association of Mississippi
- Organized to advise and educate the public on conservation of fish and other marine resources. Includes information about chapter activities around the state.
- http://www.ccamississippi.org/

Mississippi Geological Society
- Based in Jackson; promotes the pursuit of geology in the state. Information about meetings, field trips, publications, and membership.
- http://www.missgeo.com/

Mississippi Land Trust
- Conservation easement information, sample documents, organization information, and contact details.
- http://www.misslandtrust.org

Mississippi Department of Environmental Quality
- Sections for administrative services, resource center, geology, legal, land and water, and pollution control.
- http://www.deq.state.ms.us/

Backyard Nature
- Short stories about backyard plants, animals, and ecology by Jim Conrad of Mississippi.
- http://www.backyardnature.net/

Mississippi Strategic Biomass Enterprise
- State-funded economic development organization that promotes research and development of alternative energy technologies.
- http://www.msenergy.ms

Mississippi Agricultural Statistics Service
- Provides farmers, ranchers, and others with unbiased information for use in making production and marketing decisions.
- http://www.nass.usda.gov/ms/

MSUcares
- Includes a collection of research-based information about Mississippi farms, homes, and communities. Thousands of publications, information sheets, bulletins, radio and television programs, news articles, and web pages are available for download.
- http://msucares.com/

Wildlife Mississippi
- A foundation designed to provide information to its members, landowners and the public about how to conserve, restore and enhance Mississippi's fish, wildlife and plant resources.
- http://www.wildlifemiss.org/

Pullen Herbarium
- Collection of vascular plant specimens from Mississippi and the southeastern U.S., at University of Mississippi. Look up plants in the preliminary checklist of the plants of Mississippi.
- http://www.herbarium.olemiss.edu/

Mississippi Boll Weevil Management Corporation
- News and information on efforts to fight the boll weevil in Mississippi.
- http://www.bollweevil.ext.msstate.edu/