Tanch'ŏn (Korean pronunciation: [tan.tsʰʌn]) is a port city in northeastern South Hamgyŏng province, North Korea.

Tanch'ŏn is divided into 39 tong (neighbourhoods) and 39 ri (villages): There are extensive mineral resources in the area, including cobalt, magnesite, and iron ore.

In the ceremony, a joint congratulatory message sent by the Central Committee of the Workers’ Party of Korea and the Cabinet was read to the officials and members of shock brigades who performed labor feats in the construction of the port.

The line was opened in 1986 to serve the Komdok mining region though there have been no trolleybuses seen on satellite imagery since 2011.

[7][8] The population of Chinese gorals in Tanch'ŏn has been designated North Korean natural monument #293.