Amphibians and Reptiles in Armstrong County: Texas Cooperative Wildlife Collection list of species found in the county
Butterflies of Armstrong County.: Information about and pictures of all the known species of butterflies in the county.
Capitol Impact: Armstrong County: Economic, educational, and political data.
Handbook of Texas Online : Armstrong County: Current and historical information about Armstrong County.
The Political Graveyard: Armstrong County, Tex.: County information and links.
TXGenWeb Armstrong County, Texas: Genealogy information and links for the county.
YBLost: Armstrong County, Texas: Armstrong County, Texas public record information.