The Ŭnnyul Line is a non-electrified standard-gauge secondary line of the Korean State Railway in the North and South Hwanghae provinces of North Korea, running from Ŭnp'a to Ch'ŏlgwang. It is an important line in economic terms, connecting the agricultural and ore-producing areas of Kwail and Ŭnnyul counties with the rest of the DPRK.