City-Data.com: Lucas 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/Lucas_County-IA.html

Lucas County, Iowa - US Census Bureau
- Provides population, demographic, and housing information.
- http://quickfacts.census.gov/qfd/states/19/19117.html

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

Lucas County Health Center
- Nonprofit hospital offering comprehensive services in south central Iowa. Includes details of services provided, physician profiles, infant listing and job opportunities. Located in Chariton.
- http://www.lchcia.com/

Wikipedia: Lucas County, Iowa
- Encyclopedia article covers geography, demographics, cities and towns. Includes maps and 2000 Census Age Pyramid graph.
- http://en.wikipedia.org/wiki/Lucas_County,_Iowa