A few facts about Onsŏng
- About 20,000 people live in Onsŏng.
- It's part of North Hamgyong.
- It's about 563 km to Pyongyang, the country's largest city.
- For a bigger city, Namyang-nodongjagu is about 11 km away.
- Towns nearby: Namyang (11 km), Sŏngnae-ri (21 km) and Satan (54 km).