| Jangsu | |
| Native Name Lang: | ko |
| Settlement Type: | County |
| Translit Lang1: | Korean |
| Translit Lang1 Type1: | Hangul |
| Translit Lang1 Info1: | 장수군 |
| Translit Lang1 Type2: | Hanja |
| Translit Lang1 Info3: | Jangsu-gun |
| Translit Lang1 Info4: | Changsu-gun |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Honam |
| Population Blank1 Title: | Dialect |
| Population Blank1: | Jeolla |
| Area Total Km2: | 533.64 |
| Population As Of: | 2002 |
| Population Total: | 26463--> |
| Population Total: | 24,277 |
| Population As Of: | September 2024[1] |
| Population Density Km2: | 41 |
| Parts Type: | Administrative divisions |
| Parts: | 1 eup, 6 myeon |
| Image Blank Emblem: | Jangsu logo.png |
| Blank Emblem Type: | Emblem of Jangsu |
Jangsu County is a county in Jeonbuk State, South Korea. It is well known for Jangsu-Galbi.
Jangsu is twinned with:
Anyang, South Korea (1996) Hapcheon, South Korea (1999) Jinhae-gu, South Korea (1999)