| Almassora | |
| Other Name: | Almazora |
| Settlement Type: | Municipality |
| Pushpin Map: | Spain Province of Castellón#Spain Valencia#Spain |
| Pushpin Map Caption: | Location of Almassora in the Province of Castellón##Location of Almassora in the Valencian Community##Location of Almassora in Spain |
| Subdivision Type: | Country |
| Subdivision Name: |  Spain |
| Subdivision Type1: | Autonomous community |
| Subdivision Type2: | Province |
| Subdivision Name2: | Castellón |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | Plana Alta |
| Subdivision Type4: | Judicial district |
| Subdivision Name4: | Villarreal |
| Coordinates: | 39.9403°N -0.0625°W |
| Elevation M: | 31 |
| Area Total Km2: | 33 |
| Population Demonyms: | Almassorí, almassorina |
| Population Density Km2: | auto |
| Blank Name Sec1: | Official language(s) |
| Blank Info Sec1: | Valencian |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 12550 |
| Area Code Type: | Dialing code |
| Area Code: | 964 |
| Leader Title: | Alcalde |
| Leader Name: | María Tormo (2023-) |
| Leader Party: | PP |
Almassora (almaˈsoɾa/; Spanish; Castilian: Almazora) is a town and municipality in the comarca of Plana Alta, Valencian Community, Spain.
There are ancient Iberian remains within the municipal term. Its present location is from Muslim origin and it is said that the place received its name from Al-Mansur Ibn Abi Aamir 'Almansor', the Caliph of Cordova.
James I of Aragon conquered the town from the saracens in 1234. the municipal charter was given in 1237. In 1616 a channel was built to bring the water from the Millars River to the town[1] And in 1647 the Ermita de Santa Quiteria was built.