Vieux-Trois-Rivières, Heritage site district in Trois-Rivières, Canada.

Vieux-Trois-Rivières is the historic centre of Trois-Rivières, Quebec, a heritage site of about fifty institutional and residential buildings. It sits on a sandy terrace 15 m above the Saint-Laurent, at the mouth of the Saint-Maurice. Its perimeter follows a palisade plan drawn in 1704 by Jacques Levasseur de Néré, with part of the Ursuline property added and the post office excluded.

The district emerged from early French colonization and was struck repeatedly by devastating fires that prompted major rebuilding efforts. These disasters shaped the architecture and layout visible today.

The name Trois-Rivières refers to the three channels formed at the mouth of the Saint-Maurice River. The Anglican community bought the Récollets' convent in 1823 and turned it into Saint-James Church and rectory. Rue des Forges, laid out in 1857 by Mayor Joseph-Édouard Turcotte, remains a main commercial street.

The district is easy to explore on foot since most sights are concentrated and walkable throughout. Parking is available nearby, and local services like restaurants and shops are readily accessible.

The heritage site's boundary follows a palisade plan drawn in 1704 by engineer Jacques Levasseur de Néré, with part of the Ursuline property added and the post office left out. The Ursulines settled in Trois-Rivières in 1697 and moved into their convent in 1700.