| Official Name: | San Mateo |
| Settlement Type: | Municipality |
| Subdivision Type: | Country |
| Subdivision Name: | Guatemala |
| Subdivision Type1: | Department |
| Subdivision Name1: | Quetzaltenango |
| Area Total Km2: | 9.38 |
| Population As Of: | 2018 census |
| Population Footnotes: | [1] |
| Population Total: | 7895 |
| Population Density Km2: | auto |
| Population Urban: | 7719 |
San Mateo is a town and municipality in the Quetzaltenango department of Guatemala.