| Official Name: | San Carlos Alzatate |
| Settlement Type: | Municipality |
| Subdivision Type: | Country |
| Subdivision Name: | Guatemala |
| Subdivision Type1: | Department |
| Subdivision Name1: | Jalapa |
| Area Total Km2: | 80.2 |
| Population As Of: | 2018 census |
| Population Footnotes: | [1] |
| Population Total: | 18977 |
| Population Density Km2: | auto |
| Population Urban: | 8906 |
San Carlos Alzatate is a municipality in the Jalapa department of Guatemala.