San Marcos Salamander
Eurycea nana
- Critically endangered
- Card rarity: Legendary
- Amphibians

The San Marcos salamander is a small species of aquatic, lungless salamander native to the United States, endemic to Spring Lake and a small region of the headwaters of the San Marcos River near Aquarena Springs, in Hays County, Texas. It is one to two inches long, with a slender body and external gills, and is reddish-brown in color.
Classification
- Class
- Amphibia
- Order
- Caudata
- Family
- Plethodontidae
- Genus
- Eurycea