Emerald Darter
Etheostoma baileyi
- Least concern
- Card rarity: Common
- Fish

The emerald darter, is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is found only in northern and eastern Kentucky and northeastern Tennessee.
Classification
- Class
- Actinopterygii
- Order
- Perciformes
- Family
- Percidae
- Genus
- Etheostoma