Boone Valley Electric Cooperative
- Providing power to the community and surrounding area. Includes information about products and services, employment opportunities and online resources and programs.
- http://www.boonevalleyrec.com/

City-Data.com: Renwick, Iowa
- Profiles housing, population demographics, jobs, weather and climate tables. Contains a list of area hospitals, schools, airports, radio and TV broadcast stations, charts and maps.
- http://www.city-data.com/city/Renwick-Iowa.html

Wikipedia: Renwick, Iowa
- Encyclopedia article present geography and demographics of this community in Humboldt County.
- http://en.wikipedia.org/wiki/Renwick,_Iowa

Boone Valley Implement
- Farm implement dealer. Includes location, product lines, and services.
- http://www.boonevalleyimpl.com/