| Castejón | |
| Settlement Type: | Municipality |
| Pushpin Map: | Spain |
| Pushpin Map Caption: | Location in Spain |
| Subdivision Type: | Country |
| Subdivision Name: | Spain |
| Subdivision Type1: | Autonomous community |
| Subdivision Name1: | Navarre |
| Subdivision Type2: | Province |
| Subdivision Name2: | Navarre |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | Tudela |
| Coordinates: | 42.1611°N -1.7603°W |
| Elevation M: | 278 |
| Area Total Km2: | 18.07 |
| Population Demonym: | Castejoneros |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 31590 |
| Area Code Type: | Dialing code |
| Area Code: | 948 |
| Leader Title: | Mayor |
| Leader Name: | Francisco Javier Sanz Carramiñan |
Castejón is a town and municipality located in the province and autonomous community of Navarre, northern Spain.
Castejón is home to Spain's largest photovoltaic power plant (2.44 MWp), which opened in 2006.https://web.archive.org/web/20060928195114/http://www.energias-renovables.com/english/Contenidosecciones.asp?ID=7584&Tipo=&Nombre=News