Greene County Medical Center
- Hospital information on patient services, staff, and medical treatments available.
- http://www.gcmchealth.com/

Jefferson Municipal Airport - KEFW
- Aeronautical information, including location, operations, communications, runways, instrument procedures, radio frequencies and services, provided by AirNav.
- http://www.airnav.com/airport/KEFW

Jefferson Public Library
- Provides mission statement, history, statistics, and information about services and the Friends of the Library organization.
- http://www.jeffersonpubliclibrary.org/

Jefferson, Iowa
- Presents community profile and covers history, city departments, code of ordinances and information about health care, churches, recreation and schools. Includes calendar of events, online forms, photographs, FAQs and a map gallery.
- http://www.cityofjeffersoniowa.org/