| Cheolli Jangseong | |
 Map showing the location of the two Cheolli Jangseong. | |
| Korean name | |
|---|---|
| Hangul | 천리장성 |
| Hanja | 千里長城 |
| Revised Romanization | Cheolli Jangseong |
| McCune–Reischauer | Ch'ŏlli Changsŏng |
The Cheolli Jangseong or Great Wall of Korea may refer to either of two massive fortifications built between medieval Korea and the Chinese to the west and other tribes to the north. The first is a 7th-century network of military garrisons built by Goguryeo, one of the Three Kingdoms of Korea. These are now located in Northeast China. The second is an 11th-century wall built by Korea's Goryeo dynasty, now located in North Korea.