Kosan County is a kun, or county, in Kangwŏn province, North Korea.

The county is predominantly mountainous, with a central basin. Its highest point is Chuaesan. Major streams include the Namdaech'ŏn, Ryongjiwŏnch'ŏn, and Namsanch'ŏn. The county contains 13 reservoirs, and Forestland covers approximately 63.8% of its area.

Kosan county is divided into 1 ŭp (town) and 24 ri (villages):

Kosan-ŭp Chuch'ŏl-li Chukkŭm-ri Haebang-ri Hyŏnch'ang-ri Kŭm-ri Kŭmch'ŏl-li Kŭmp'ung-ri Kuryŏng-ri Kuŭp-ri Kwangmyŏng-ri Namsal-li Pongryŏl-li

Pup'yŏng-ri Ranjŏng-ri Ryongjiwŏl-li Ryongsa-ri Sahyŏl-li Sant'al-li Sanyang-ri Sinhyŏl-li Sŏlbong-ri Sŏngbung-ri Yŏnho-ri Winam-ri

Agriculture dominates local industry in Kosan, with crops including rice, maize, millet, wheat, barley, soybeans, and red beans. The region is particularly noted for its abundant production of fruit.

Mining is widely developed, exploiting the local deposits of gold, silver, copper, iron, limestone, lead, zinc, gypsum, and other minerals.

Kosan county is served by the Kangwŏn Line of the Korean State Railway.

• Geography of North Korea
• Administrative divisions of North Korea

• In Korean language online encyclopedias:
  • Doosan Encyclopedia (Naver)
  • Korean language Britannica (Empas) (Map)
  • Encyclopedia of Korean Culture (Empas)
  • Pascal World Encyclopedia (Nate)