Gilja is a village in Gjesdal Municipality in Rogaland county, Norway. The village is located about 5 kilometres (3.1 mi) southeast of the village of Dirdal in the Dirdalen valley. The Frafjord Tunnel connects Gilja with the village of Frafjord, located in the next valley on the other side of the mountains.

The 0.31-square-kilometre (77-acre) village has a population (2025) of 390 and a population density of 1,258 inhabitants per square kilometre (3,260/sq mi). The village is the site of a window factory which employs many of the local inhabitants.