Schroeder Public Library
- Provides its history, director's profile, annual report, reading lists, online catalog, information about services and hours.
- http://www.keystone.lib.ia.us/

Wikipedia: Keystone, Iowa
- Encyclopedia article highlights geography and demographics of this community in Benton County.
- http://en.wikipedia.org/wiki/Keystone,_Iowa

Keystone Emergency Medical Services
- Voluntary paramedics, EMTs and first responders helping the community. Includes events and details of services.
- http://showcase.netins.net/web/keystoneems/

Keystone Savings Bank
- Offering commercial, loan and online banking services.
- http://www.keystonesavings.com