Petit-Rocher (French pronunciation: [pəti ʁɔʃe]) is a former village in Gloucester County, New Brunswick.

The former local service districts of Petit-Rocher-Nord (Devereaux) and Petit-Rocher-Sud bordered the village on the north and south, respectively.

The name literally means "little rock", and is pronounced by most anglophones in the region as Petty Roche.

[5] On January 1, 2023, Petit-Rocher amalgamated with Beresford, Nigadoo, Pointe-Verte and all or part of ten local service districts to form the new town of Belle-Baie.

In 2012 and 2013, Petit-Rocher was host to the CCBHA's annual ball hockey tournament with a team from nearby Dundee taking home the Allen, Paquet & Arseneau cup as champions for both tournaments.