The Ongjin Line is a partially electrified standard-gauge secondary line of the Korean State Railway in South Hwanghae Province, North Korea, running from Haeju on the Hwanghae Ch'à Ângnyà Ân Line to Ongjin.
Established in 1923 through the merger of six smaller railways, by the mid 1930s the Chosen Railway (Chà Âtetsu) had become the largest privately owned railway in colonial Korea, and had built an extensive network of narrow gauge rail lines in the Hwanghae region. By the end of 1935 this Hwanghae Line network ran Sariwà ÂnâÂÂSamgangâÂÂSugyo, SamgangâÂÂEast HaejuâÂÂHaeju Port, and HaejuâÂÂEast HaejuâÂÂTosà Âng.
The beginnings of what would eventually become the Ongjin Line were laid in 1931, when the line from East Haeju to Haeju Port at Ryongdangp'o was opened on 12 November of that year, and on 1 July 1933, when Haeju Station was opened following the completion of the line west from East Haeju. On 11 May 1934, Sà Âbyà Ân Station was opened on that segment, which was later renamed Tongp'o. Construction of the Ongjin Line proper began from Haeju Station, with the first section to Ch'wiya (nowadays called Pyà Âksà Âng) opened on 11 December 1936. In May 1937, two new stretches were opened: a short () section from Tongp'o to Chà Ângdo on the 10th, and from Ch'wiya to Ongjin on the 19th.
Chà Âtetsu sold the Hwanghae Line network to the Chosen Government Railway on 1 April 1944, which absorbed and then split the network into separate lines, with the HaejuâÂÂOngjin line becoming known as the Ongjin Line, and the Tongp'oâÂÂChà Ângdo line becoming the Chà Ângdo Line; the East HaejuâÂÂTongp'oâÂÂHaeju Port section was made part of the SamgangâÂÂEast Haeju Sahae Line.
Following the end of the Pacific War, the subsequent partition of Korea left the Ongjin Line divided between the Soviet and American zones of occupation, with the 38th parallel splitting the line near Chayang Station. After the end of the Korean War the entire line was within the DPRK. After the conversion of the Sariwà ÂnâÂÂHaeju Hwanghae Ch'à Ângnyà Ân Line to standard gauge in 1958, the Ongjin and Chà Ângdo Lines were likewise regauged, during which the East HaejuâÂÂHaejuâÂÂWest Haeju line running through the middle of the city was closed. A new passenger station for Haeju, Haeju Ch'à Ângnyà Ân Station was opened immediately adjacent to the East Haeju freight yards, along with a new line from Wangsin (formerly Tongp'o) to West Haeju. Electrification of the East HaejuâÂÂWangsinâÂÂWest Haeju section of the line was completed by April 1982.
Commuter trains run on the line from West Haeju to Hakhyà Ân on the Hwanghae Ch'à Ângnyà Ân Line via Haeju Ch'à Ângnyà Ân and Changbang.
A yellow background in the "Distance" box indicates that section of the line is not electrified.