Butterflies of Armstrong County.
- Information about and pictures of all the known species of butterflies in the county.
- http://www.butterfliesandmoths.org/map?dc=1427&_dcc=1&si=44

Capitol Impact: Armstrong County
- Economic, educational, and political data.
- http://www.capitolimpact.com/gw/cntydetail.asp?state=tx&stfips=48&stname=Texas&fips=48011

Handbook of Texas Online : Armstrong County
- Current and historical information about Armstrong County.
- http://www.tsha.utexas.edu/handbook/online/articles/AA/hca6.html

The Political Graveyard: Armstrong County, Tex.
- County information and links.
- http://www.politicalgraveyard.com/geo/TX/AM.html

Amphibians and Reptiles in Armstrong County
- Texas Cooperative Wildlife Collection list of species found in the county
- http://wfscnet.tamu.edu/tcwc/checklist/armst006.htm

TXGenWeb Armstrong County, Texas
- Genealogy information and links for the county.
- http://www.rootsweb.com/~txarmstr/