Cleveland Grotto
- Features a calendar of events, a newsletter, a photo gallery, links and contact information.
- http://www.clevelandgrotto.org

WUSS
- Located in Springfield, Ohio and a chapter of the NSS since 1980. Promotes exploration, scientific study, safety and conservation. Includes calendar of events, equipment tips, photos and contacts.
- http://www4.wittenberg.edu/student_organizations/wuss/

Ohio River Valley Caving Region
- Affiliated with the National Speleological Society. Dedicated to study and preservation of caves in Kentucky, Indiana and Ohio. Includes contacts, projects, meeting, and membership information.
- http://bluegrassgrotto.org/ovr.html

Greater Cincinnati Grotto
- Member of the NSS. Dedicated to conservation, exploration and research. Includes contact information, newsletter, calendar of events, library holdings and photo galleries.
- http://www.gcgcavers.com/

Central Ohio Grotto
- Founded in 1952 for exploration and mapping trips. Includes calendar of events, newsletter, photos, meeting and contact information.
- http://www.tuningoracle.com/COG/