Mississippi Society of Certified Public Accountants
- Serves as the state advocate for Certified Public Accountants. Member and educational services.
- http://www.ms-cpa.org/

North Mississippi Hotel and Lodging Association
- Association of hotel and lodging facilities as well as allied members who are vendors and other businesses who support hospitality industry.
- http://www.northmshotels.com/

Mississippi Technology Alliance
- Promotes technology business in the state, through coordination of industry, academia, and government.
- http://www.technologyalliance.ms/

Mississippi Farm Bureau
- Organization promoting the interests of its member farmers. Member benefits, news, legislative initiatives, and other information.
- http://www.msfb.com/

Mississippi Economic Development Council
- Works to bring new business and jobs to the state. Information about the organization, its activities, and links to related sites including chambers of commerce around the state.
- http://www.medc.ms/

Mississippi Propane Gas Association
- Provides an avenue for Mississippi dealers, propane suppliers and industry related businesses to work together to promote the views and good will of the propane industry.
- http://www.mspropane.com

Make Mine Mississippi
- A logo identification program of the state Department of Agriculture and Commerce designed to promote in-state products and services.
- http://www.makeminemississippi.com/

Mississippi Forestry Association
- Non-profit organized to promote responsible forest management and maintain a positive political and economic climate for forestry in the state. Includes information about the organization, its concerns, and forests and forest management.
- http://msforestry.net/

Mississippi Coroner's Association
- With information and links to many areas of interest to coroners and medical examiners.
- http://www.mscoroner.org/

Mississippi Home Corporation
- Created to address housing needs for low and moderate income Mississippians. Develops private and public partnerships throughout the state and nation to increase the awareness of need for affordable housing.
- http://www.mshomecorp.com/

South Mississippi Lawn and Landscape Association
- Professional organization promoting lawn, landscape, nursery, and related green industry on the Mississippi Gulf Coast.
- http://www.smlla.gulfcoast-gardening.com

Southern Mississippi Planning and Development District
- A regional planning group serving southern Mississippi with programs for the elderly and small businesses.
- http://www.smpdd.com

Mississippi Economic Council
- Since 1949, MEC has served as the "voice of business" before the Mississippi Legislature and as the state chamber of commerce.
- http://www.msmec.com