Grolley is a municipality in the district of Sarine in the canton of Fribourg in Switzerland.

Fribourg is the capital of the Swiss canton of Fribourg and district of La Sarine. Located on both sides of the river Saane/Sarine, on the Swiss Plateau, it is a major economic, administrative and educational centre on the cultural border between German-speaking and French-speaking Switzerland. Its Old City, one of the best-maintained in Switzerland, sits on a small rocky hill above the valley of the Sarine. In 2018, it had a population of 38,365.