Capitol Impact: Cumberland County
- Political, educational, and economic data.
- http://www.capitolimpact.com/gw/cntydetail.asp?state=ky&stfips=21&stname=Kentucky&fips=21057

National Association of Counties - Profile of Cumberland County
- Provides a list of elected officials, cities within the county, census details, and contact details for the county court house.
- http://www.naco.org/Template.cfm?Section=Find_a_County&Template=/cffiles/counties/county.cfm&id=21057

Cumberland County Decennial Population Statistics - 1800 - 2000
- Includes total population, county area, and population density.
- http://ukcc.uky.edu/~census/21057.txt

Census Bureau - Cumberland County
- Provides population and economic information.
- http://quickfacts.census.gov/qfd/states/21/21057.html