Humboldt County Memorial Hospital
- Critical access hospital which includes acute and skilled care along with a 28 bed distinct part long-term care unit. Contains profile, visitor, billing and employment information.
- http://www.humboldthospital.org/

Historic Bridges of the U.S. : Bridges in Humboldt County, Iowa
- Database provides overview, status, history and categories of bridges in the county. Includes photographs.
- http://www.bridgehunter.com/ia/humboldt/

Wikipedia: Humboldt County, Iowa
- Encyclopedia article covers geography, demographics and links to cities and towns. With maps.
- http://en.wikipedia.org/wiki/Humboldt_County,_Iowa

City-Data.com: Humboldt County, Iowa
- Profiles population demographics, jobs, housing, agriculture and crime statistics. Contains a list of recreational areas, churches, cemeteries, post offices, charts, graphs and maps.
- http://www.city-data.com/county/Humboldt_County-IA.html

Humboldt County, Iowa - US Census Bureau
- Provides population, demographic, and housing information
- http://quickfacts.census.gov/qfd/states/19/19091.html

Iowa State University Extension - Humboldt County
- Offers agricultural, business, family and 4-H programs and resources. Includes staff directory, news, events, hours and directions. Located in Humboldt.
- http://www.extension.iastate.edu/humboldt/

Humboldt County REC
- Electrical distribution cooperative. Includes company profile, information about products and services, safety programs, photographs, newsletter, customer forms, resources and links.
- http://www.humboldtrec.coop/

Humboldt County Fair
- Annual event features its schedule, a directory of board members, building rental rates, and location.
- http://www.humboldtcountyfair.com/