| Danyang | |
| Native Name Lang: | ko |
| Translit Lang1: | Korean |
| Settlement Type: | County |
| Translit Lang1 Type1: | Hangul |
| Translit Lang1 Info1: | Korean: 단양군 |
| Translit Lang1 Type2: | Hanja |
| Translit Lang1 Info2: | Korean: {{linktext|丹|陽|郡 |
| Translit Lang1 Info3: | Danyang-gun |
| Translit Lang1 Info4: | Tanyang-gun |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Hoseo |
| Population Blank1 Title: | Dialect |
| Population Blank1: | Chungcheong |
| Area Total Km2: | 781.07 |
| Population As Of: | 2002 |
| Population Total: | 37320 |
| Population Density Km2: | 51 |
| Parts Type: | Administrative divisions |
| Parts: | 2 eup, 6 myeon |
| Image Blank Emblem: | Danyang.jpg |
| Blank Emblem Type: | Emblem of Danyang |
Danyang County is in North Chungcheong Province, South Korea.
The geographical terrain is 83.7% mountainous and 11.2% cultivable. 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 23.7km (14.7miles) 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. Danyang Stream, which has its source in Hakseongsan, Gyeongsangbuk-do, joins the Namhan River at Habang-ri, Danseong-myeon, together with Jungnyeong Stream flowing from Jungnyeong and Dosolsan to Hyeoncholli, Danyang-eup, Maepo Stream from Geumsusan to Dodam, and Geumgok Stream from Biro Peak to Gosu-ri, Danyang-eup.[1]
Danyang has a monsoon-influenced humid continental climate (Köppen: Dwa) with cold, dry winters and hot, rainy summers. The county, which is situated in an inland mountainous area, epitomizes an inland climate with severe variations in temperatures. The annual average temperature reaches 11.7C, with the highest at 17.9C and the lowest at 6.6C, and its annual rainfall averages 1049.9mm.
Danyang is twinned with: