| Namjeju | |
| Native Name Lang: | Korean |
| Translit Lang1: | Korean |
| Settlement Type: | County |
| Translit Lang1 Type1: | Hangul |
| Translit Lang1 Info1: | Korean: 남제주군 |
| Translit Lang1 Type2: | Hanja |
| Translit Lang1 Info2: | Korean: {{linktext|南|濟|州|郡 |
| Translit Lang1 Info3: | Namjeju-gun |
| Translit Lang1 Info4: | Namcheju-gun |
| Mapsize: | 280px |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Jeju |
| Population Blank1 Title: | Dialect |
| Population Blank1: | Jeju |
| Image Blank Emblem: | Namjeju logo.png |
| Blank Emblem Type: | Emblem of Namjeju |
Namjeju County (Namjeju-gun; "South Jeju County") was a county in Jeju Province, South Korea until July 1, 2006 when it was merged with Seogwipo City.