| Subdivision Type: | Country |
| Subdivision Name: | Spain |
| Subdivision Type1: | Autonomous community |
| Subdivision Name1: | Aragón |
| Subdivision Type2: | Province |
| Subdivision Name2: | Huesca |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | Jacetania |
| Subdivision Type4: | Municipality |
| Subdivision Name4: | Jaca |
| Population Total: | 0 (2019) |
| Nickname: | carboneros |
| Settlement Type: | Abandoned village |
Acín is an unpopulated village in Spain, within the municipality of Jaca, in the province of Huesca. It is located in the valley of the Garcipollera, in the Aragonese region of the Jacetania.
It is not inhabited, after having been expropriated in the 1960s for the construction of the Yesa Reservoir, with the intention of replanting it with pine trees to prevent the accumulation of sediments caused by the rains from accelerating the clogging of the newly built reservoir.
The remains of Acín, today in complete ruins and invaded by vegetation, are located in the valley of the Ijuez river, a tributary of the Aragón river, in the Garcipollera, at a short distance from the riverbed of the aforementioned river. The name Garcipollera originates from having been known as vallis Cepollaria in Roman times, which in Spanish translates as onion valley.
The only remaining buildings are the ruins of the Romanesque church of San Juan Bautista. On the river bank, there is a communal recreational area.
In 1374 it is mentioned as Açin de la Rosa.
In 1961, and according to the terms of Decree 2543/61, of December 7, published in the Official State Gazette number 303, of December 20, Acín was officially incorporated into the municipality of Jaca.
The temple of San Juan Bautista, the only remaining building and currently in ruins, was owned by the Monastery of San Juan de la Peña until the 16th century when it passed to the Diocese of Jaca. It was the parish church of the town. Of simple construction, it consists of a rectangular nave topped by a semicircular apse in the area of the altar. In the 17th century the church was renovated and a new nave was attached to the south wall of the existing one. Within its constructive simplicity, two elements stand out: the square tower that served as a bell tower and that today marks the location of Acin among the undergrowth and the original apse, built in the 13th century.
Demographic data for the town of Acín since 1900:[1] [2]
Demographic data of the municipality of Acín, 1842[3]