Onsŏng is located in North Korea (Hambuk) and time zone Asia/Pyongyang.
Places nearby are Namyang, Tumen and Kyŏngwŏn.
Hamhŭng is 388 km away, Hŭngnam is 391 km away and Sunch’ŏn is 506 km away as the crow flies.
Distances from Onsŏng to the most important cities in North Korea and the world.
42.9572200°
129.9933300°
County in North Hamgyong Province, North Korea
https://en.wikipedia.org/wiki/Onsong_CountyPolitical prison camp in North Korea
https://en.wikipedia.org/wiki/Onsong_concentration_camp