Sos del Rey Católico
| Coordinates: 42°29′48″N 1°12′53″W / 42.49667°N 1.21472°W | |
| Country | Spain |
| Autonomous community | Aragon |
| Province | Zaragoza |
| Comarca | Cinco Villas |
| Municipality | Sos del Rey Católico |
| Founded | 907 |
| Government | |
| • Mayor | Jesús Iso |
| Area | |
• Total | 216.62 km2 (83.64 sq mi) |
| Elevation | 652 m (2,139 ft) |
| Population (2018) | |
• Total | 588 |
| • Density | 2.7/km2 (7.0/sq mi) |
| Demonym | Sosienses |
| Time zone | UTC+1 (CET) |
| • Summer (DST) | UTC+2 (CEST) |
| Postal Code | 50680 |
| Type | Non-movable |
| Criteria | Historic ensemble |
| Designated | 6 June 1968 |
| Reference no. | RI-53-0000096 |
Sos del Rey Católico (in Aragonese: Sos d'o Rei Catolico) is a historic town and municipality in the Cinco Villas comarca, province of Zaragoza, in Aragon, Spain.