Goesan County (Korean: 괴산군; RR: Goesan-gun) is a county in North Chungcheong Province, South Korea.

As of 2021, Goesan-gun has a population of about 40,000 people. The area has been affected strongly by the graying of the South Korean population, and more than a third of residents are over the age of 65. Schools have closed as urbanization and falling birthrates in Korea have resulted in a declining number of children to attend them. One school, to prevent closure due to low enrollment, offers free housing to families with school-age children.

• Sanmagi-yetgil

Sanmagi-yetgil is a 5 km (3.1 mi) road that extends from Sao-rang-maeul village (Oe-sa-ri, Chilseong-myeon, Goesan-gun, Chungbuk) to Sanmagi village in the mountains. It is a stroll path restored to resemble the traditional mountain road with a picturesque landscape.

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Goesan is twinned with:

• Gwanak-gu, Seoul
• Gangnam-gu, Seoul
• Guro-gu, Seoul
• Jung-gu, Incheon
• Anyang, Gyeonggi
• Ansan, Gyeonggi
• Uiwang, Gyeonggi

• Ji'an, Jilin, China

• Geography of South Korea
• Chungcheong

• Goesan County home page (in English)
• Goesan County home page (in Korean)

36°48′39″N 127°47′41″E / 36.8108333433°N 127.794722232°E / 36.8108333433; 127.794722232