The Roanoke logperch (Percina rex) 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 inhabits low and moderate-gradient streams and rivers in warm, clear water in mostly unsilted gravel and rubble in runs, pools, and riffles.

This enables it to reach prey sheltered beneath rocks that may be unavailable to other benthic fishes; however, this feeding behavior relies on the availability of loosely embedded substrate.

The threats it faces are from urbanization, the impoundment of water resulting in the silting of waterways, and industrial and agricultural pollution.

[1] In 2023 the Roanoke logperch was featured on a United States Postal Service Forever stamp as part of the Endangered Species set, based on a photograph from Joel Sartore's Photo Ark.

The stamp was dedicated at a ceremony at the National Grasslands Visitor Center in Wall, South Dakota.