Isín

Isín ( Spanish pronunciation: [is'in]) is a locality belonging to the municipality of Sabiñánigo (Alto Gállego, Huesca, Aragon, Spain). In 2019, it had a population of 5 inhabitants. The populated place lies in the valley formed by the Aurín (river), on its right bank, at about 1027 metres above sea level.

A standalone municipality in the 1842 census, it was annexed by Acumuer before the 1857 census.