| Type: | municipality |
| Official Name: | Berdejo |
| Area Total Km2: | 19.46 |
| Elevation M: | 990 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Pushpin Map: | Spain Aragon#Spain#Europe |
| Coordinates: | 41.5667°N -58°W |
Berdejo is a municipality located in the province of Zaragoza, Aragon, Spain. According to the 2004 census (INE), the municipality had a population of 66 inhabitants.
In ancient times, Berdejo was known by the names of Berdeio or Vergegium,[1] which has led to the mistake of the birthplace of San Millán with Berceo. The municipality is crossed by the Manubles, a tributary of the Jalón River. From his church was San Millán priest about the year 560, when Torrelapaja was a district of Berdejo. Today the Church of San Millán is framed in the Arciprestazgo del Alto Jalón of the diocese of Tarazona. It is connected through the A-1502 road.