The Mobile logperch (Percina kathae) 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 in the Mobile River basin in Mississippi, Alabama, Tennessee, and Georgia in the southeastern United States.

It grows to about 18 cm (7 in) and is distinguishable from other darters by the distinctive shape of its head and by its pale-yellow base color, with narrow bars on back and sides.

[6] The Mobile logperch is found in shallow water in the summer, but uses deeper reaches, or uses depths randomly, in all other seasons.

[8] Some species (including Percina) indicate that longitudinal position was a strong covariate with little support that Podostemum cover influenced occupancy.

[10] Large numbers of reservoir-based individuals frequently migrate upstream into small flowing streams from late February into May to spawn (in Carrolls Creek, a tributary of Lake Tuscaloosa, Alabama).

Not much research on changes in this species' population over time and no management practices have been put in place to protect the Mobile logperch.