| Aínsa Aragonese: L'Aínsa | |
| Settlement Type: | Locality |
| Subdivision Type: | Country |
| Subdivision Type1: | Autonomous region |
| Subdivision Type2: | Province |
| Subdivision Type3: | Comarca |
| Subdivision Type4: | Municipality |
| Subdivision Name: | Spain |
| Subdivision Name1: | Aragon |
| Subdivision Name2: | Huesca |
| Subdivision Name3: | Sobrarbe |
| Subdivision Name4: | Aínsa-Sobrarbe |
| Timezone1: | CET |
| Timezone Dst: | CEST |
| Pushpin Map: | Spain |
| Pushpin Mapsize: | 280 |
| Pushpin Map Caption: | Map showing Aínsa in a map of Spain |
| Coordinates: | 42.4167°N 0.1333°W |
Aínsa (Aragonese: L'Aínsa) is the main town in the Aínsa-Sobrarbe municipal territory, Aragon, Spain.
It is located south of the Pyrenees, in a geologically interesting setting at the north of Huesca.[1] Besides the surrounding mountain landscape, the 12th-century Iglesia parroquial de Santa María church and the 11th-century castle are the main sights of the town. It is believed that there is a connection between the Ainsa and the Anza family surnames.[2]