St. Joseph Valley Grotto of the National Speleological Society
- Located in Mishawaka, Indiana. Active in conservation, photography, cartography and exploration. Includes meeting and contact information.
- http://www.caves.org/io/iolookup.php?ionum=000413

Purdue Outing Club
- Grotto of the NSS. Features Guide to Responsible Caving, equipment inventory, trip reports, message board and contact information.
- http://poc.purdue.org/caving.php

Indiana University Spelunking Club
- Located in Bloomington. Promotes conservation, exploration and safety. Includes calendar of events, trip reports, photo album, membership and contact information.
- http://www.indiana.edu/~iusc/

Bloomington Indiana Grotto
- Includes minutes of meetings, upcoming events and newsletter.
- http://www.caves.org/grotto/big/big.html

Northern Indiana Grotto
- Active in conservation, photography and mapping. Includes calendar of events, newsletter, photos and contact information.
- http://www.caves.org/grotto/nig/about.html

The Indiana Karst Conservancy
- Dedicated to the preservation and conservation of unique karst features. Includes activities and membership information.
- http://www.caves.org/conservancy/ikc/

The Indiana Cave Survey
- Features ICS officers, cave reports, and caving information and resources.
- http://www.caves.org/survey/ics/

Harrison Crawford Grotto
- Located in Southern Indiana and a chapter of the NSS. Dedicated to exploration, conservation, preservation and safety. Includes meeting minutes, events, members list and contacts.
- http://www.caves.org/grotto/hcg/

Central Indiana Grotto
- Meets in Indianapolis. Includes calendar of events, newsletter, photo gallery, Constitution and Bylaws, membership and contact information.
- http://www.caves.org/grotto/cig/