Olonzac (French pronunciation: [ɔlɔ̃zak]; Occitan: Lonzac) is a commune in the Hérault department in the Occitanie region in southern France.

There are several cafes in the town and shops including a Post Office and pharmacy.

The schools are Ecole Maternelle Henri Matisse and Ecole Elementaire Jean-Pierre Malric, both located by "La Condamine", and College Antoine Faure, located west of the park.

There is a large park east of the town centre, a boulodrome and tennis courts.

This Hérault geographical article is a stub.