La Nouvelle-Beauce (French pronunciation: [la nuvɛl bos], New Beauce) is a regional county municipality in the Chaudière-Appalaches region in southeastern Quebec, Canada, south of the Saint Lawrence River.

It is located south of Lévis, along the Chaudière River.

Sainte-Marie, the county seat, is the most populous municipality.

The name of La Nouvelle-Beauce reminds the one given to the area along the Chaudière River by the French authorities until the end of the French Regime in North America.

Highways and numbered routes that run through the municipality, including external routes that start or finish at the county border:[5]