Danyang County (Korean: 단양군; RR: Danyang-gun) is in North Chungcheong Province, South Korea.

It is very rugged, except in some of the urban areas and villages that can be found in the valleys and hills.

The main water system ranges from the upper stream of the 23.7 km (14.7 mi) long Namhan River, which flows through the county.

Pyeongchang River, one of the streams flowing from Odaesan, joins several streams at Jungnyeong, Danyang, and Geumgok, originating from Sobaeksan.

[3] Danyang has a monsoon-influenced humid continental climate (Köppen: Dwa) with cold, dry winters and hot, rainy summers.