Amphibians and Reptiles in McMullen County
Texas Cooperative Wildlife Collection list of species found in the county.
Butterflies of Mc Mullen County, Texas
Information about and pictures of all the known species of butterflies in the county.
Handbook of Texas Online
Current and historical information about McMullen County.
McMullen County QuickFacts from the US Census Bure
Population, demographic, and housing information from the 1990 census. Link to Tiger map of the county.
McMullen County TXGenWeb Project
County history, genealogy, and links.
The Political Graveyard: McMullen County, Tex.
Information about politicians that lived or died in the county.