Round Whitefish lives in lakes with a well oxygenated deep zone and is native to seven of 18 watersheds in the Adirondack Mountains. Also, it has been known as non-native to the Oswegatchie watershed (previously stocked) with no records since 1955. Most of its range has decreased and it is extirpated from the Upper Hudson watershed. Today, round whitefish is known from only eight historic sites, and a stocking program has established two additional self-sustained populations within its former range. It is classified as Threatened.