| Type: | parish |
| Official Name: | Cesar |
| Region: | Norte |
| Metro: | Porto |
| District: | Aveiro |
| Municipality: | Oliveira de Azeméis |
| Coordinates: | 40.918°N -8.439°W |
| Area Total: | 5.43 |
| Population As Of: | 2011 |
| Population Total: | 3166 |
Cesar is a civil parish in the municipality of Oliveira de Azeméis, Portugal. The population in 2011 was 3,166,[1] in an area of 5.43 km2.[2] It received town status on 13 July 1990. The Battle of Cesar took place here.