| Official Name: | Llamellín |
| Other Name: | San Andrés de Llamellín |
| Settlement Type: | Town |
| Coordinates: | -9.1333°N -78°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Ancash |
| Subdivision Type2: | Province |
| Subdivision Name2: | Antonio Raimondi |
| Subdivision Type3: | District |
| Subdivision Name3: | Llamellín |
| Leader Title: | Mayor |
| Leader Name: | Félix Sandoval Díaz (2019-2022) |
| Area Total Km2: | 90.82 |
| Population Total: | 3847 |
| Population As Of: | 2005 |
| Population Density Km2: | auto |
Llamellín is a town in central Peru, capital of the province Antonio Raimondi in the region Ancash.