Sant Mateu
| Sant Mateu | |
|---|---|
| Coordinates: 40°27′54″N 0°10′49″E / 40.46500°N 0.18028°E | |
| Country | Spain | 
| Autonomous community | Valencian Community | 
| Province | Castelló | 
| Comarca | Baix Maestrat | 
| Judicial district | Vinaròs | 
| Area | |
|  • Total | 64.6 km2 (24.9 sq mi) | 
| Elevation | 325 m (1,066 ft) | 
| Population  (2018) | |
|  • Total | 1,974 | 
| • Density | 31/km2 (79/sq mi) | 
| Demonym(s) | Santmatevà, santmatevana | 
| Time zone | UTC+1 (CET) | 
| • Summer (DST) | UTC+2 (CEST) | 
| Postal code | 12170 | 
| Official language(s) | Valencian | 
Sant Mateu is a town and municipality in eastern Spain, in the province of Castellón, part of the autonomous community of Valencia.
Spanish/Mexican cartoonist and writer Sergio Aragonés was born here.