|Province||South Hamgyong Province|
|Administrative divisions||1 ŭp, 3 workers' districts, 21 ri|
|North Korean name|
|South Korean name|
"Riwŏn" is the official North Korean romanization of the county's name, using the McCune–Reischauer system. The breve is often omitted. It is named for its seat, Riwon. Due to the silting of the mouth of the Namdae, Riwon was located a little inland by the 1950s, with a larger port named Kunsŏn. The two communities have since merged under the name Riwon. In South Korean sources, the county's name often appears as 이원, now officially romanized as Iwon using Revised Romanization. The MR romanization used before the year 2000 was Iwŏn.
Riwŏn is mountainous, although there are also small plains, and is home to the Taedŏk Mountains (대덕산맥). The highest peak is Taedŏksan (1,442 m). There are some 10 significant streams; the chief of these is the Namdaech'ŏn, which drains into the Sea of Japan. There are various bays and islands along the coast. Thanks to its coastal location, the county enjoys a mild maritime climate. Forestland (70% of which is coniferous) takes up 73% of the county's area.
Mining and manufacturing
Machine manufacturing dominates the local economy, accounting for half of annual industrial production. Deposits of iron, iron sulfide, talc, limestone, graphite, quartzite and silica are found in the county. The Riwon Mine produces talc.
- "Map of Korea", Pyongyang: Map Publishing House of the Democratic People's Republic of Korea, 1986.
- "NK 52-11: Sōngjin", AMS Series L552, Washington: Army Map Service, 1954.
- ?, Seoul: National Geographic Information Institute, 2009. (in Korean)
- "Korea and Vicinity", Seoul: National Geographic Information Institute, 2010.
- (in Korean) In Korean language online encyclopedias: