Iliamna corei is a rare species of flowering plant in the mallow family known by the common name Peters Mountain mallow. It is endemic to Virginia in the United States, where it is known only from Peters Mountain in Giles County. A single occurrence remains. This is a federally listed endangered species. It is considered "one of the rarest native plants in the United States." This species has sometimes been included within the description of Iliamna remota, but genetic analysis suggests it be maintained as a species in its own right.