Kansas City Area Grotto
- Affiliated with the NSS. Dedicated to exploration and conservation. Includes meeting and contact information, newsletter, events, photos and equipment checklist.
- http://www.kcgrotto.org

Stygian Grotto Caving Society
- Based in St. Louis and affiliated with the NSS. Includes meeting and contact information.
- http://www.caves.org/io/iolookup.php?ionum=000279

Ozark Highlands Grotto
- Founded in 1975 and member of the National Speleological Society. Promotes study, exploration and conservation. Contains member's manual, newsletter, list of members and contacts.
- http://www.ozarkhighlandsgrotto.org/

Missouri Caves and Karst Conservancy
- Formed for acquisition, management and conservation of karst areas. Includes membership information, list of publications and contacts.
- http://www.mocavesandkarst.org

Missouri Mountaineers & Adventurers
- MMA is an independent group participating in rock climbing, mountaineering, caving, canoeing, and rapelling trips. Includes photo galleries and contacts.
- http://www.missourimountaineers.com/

MSM Spelunkers Club
- Located in Rolla. Member of National Speleological Society since 1953. Promotes exploration, protection, conservation and documentation of caves. Includes history of group, meeting and contact information.
- http://web.umr.edu/~spelunk/

Missouri Speleological Survey
- Composed of affiliated groups and independent individuals known as cooperators. Involved in exploration, cartography, photography, research and conservation projects. Includes membership and contact information.
- http://www.mospeleo.org/

Meramec Valley Grotto
- Dedicated to research, exploration, and conservation. Chapter of the NSS and member of the MSS. Includes trip reports, membership requirements, library holdings, safety and conservation notes, meeting and contact information.
- http://home.swbell.net/bob4mvg/MVG/

Club 69 No Rules
- A mixed bag of cavers having fun, some nonsense, and other caving related stuff...
- http://home.swbell.net/bob4mvg/club69.html

Chouteau Grotto
- Located in Columbia, Missouri. Dedicated for the preservation and conservation of caves. Includes Constitution and Bylaws, meeting minutes, trip reports, photos and contact information.
- http://chouteau.missouri.org/

Carroll Cave Conservancy
- Dedicated to the conservation and perpetual protection of the Toronto Springs watershed. Includes Constitution and Bylaws, access policy. projects reports, photo gallery, membership requirements and contacts.
- http://www.carrollcave.org/