Pottawatomie River, a stream of eastern Kansas, is composed of two branches. The north fork rises in the southwest corner of Anderson county, about 2 miles south of the village of Westphalia, and flows in a northerly and northeasterly course through the townships of Westphalia, Reeder, Jackson, Monroe, Putnam and Walker. The south fork rises in Richland township of the same county, about 2 miles west of Selma, and flows northwest into Washington township, where it turns toward the northeast and forms a junction with the north fork not far from the town of Greeley. From that point the course of the main stream is northeast until it empties into the Osage river, just below the town of Osawatomie, Miami county.