Schmidtea polychroa is a species of freshwater flatworm, a dugesiid triclad that inhabits the shallow mesotrophic or eutrophic waters of rivers and lakes of Europe.

It is also present in North America, where it has been introduced at least in the Saint Lawrence river system.

[3] S. polychroa has a rounded head and a pointed back end with relatively no constriction.

[4] Individuals of this species search for food actively; they feed mainly on small invertebrates.

Schmidtea polychroa produces cocoons in water temperatures between 10 and 23 °C.