Wikipedia: Butler County, Iowa
- Encyclopedia article features geography, demographics and links to cities and towns. Includes maps.
- http://en.wikipedia.org/wiki/Butler_County,_Iowa

City-Data.com: Butler 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/Butler_County-IA.html

Butler County , Iowa - US Census Bureau
- Provides population, demographic, and housing information.
- http://quickfacts.census.gov/qfd/states/19/19023.html

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

Butler County Iowa
- Features overview, information about communities, annual events, history and attractions, government, recreation and education. Includes links to business websites, maps and photographs.
- http://www.butlercountyiowa.com/

Butler County Rural Electric Cooperative
- Member-owned cooperative. Includes calendar of events and information about renewable energy, electrical safety, and heating and cooling.
- http://www.butlerrec.coop/

Aplington-Parkersburg Schools
- Features the district's annual progress report, the board minutes, statistics, and links to the buildings.
- http://www.apl-park.k12.ia.us/

Butler County Fair
- Includes schedule, a list of staff, photos, and judging results.
- http://www.butlercountyfair.com/

Butler County
- Includes information about county departments, events, and elections.
- http://www.butlercoiowa.org/