The shores of Lac Sergent have a high density of residences and chalets, particularly in the village of Lac-Sergent, located south of the lake.

The southern half of the landfill route is in the parish municipality of Saint-Basile; it flows in parallel (on the north side) to the Blanche river which supplies to Lac Blanc located 1.8 kilometres (1.1 mi) south-east of the mouth of Lac Sergent.

The railroad of Canadian National (formerly the Transcontinental) which serves the top of the county of Portneuf, bypasses the village of Lac-Sergent by the south.

The historian Eugène Rouillard alleges that this toponym has its origin at the beginning of {XIXthand that this designation pays homage to an old soldier who would have lived on the edge of this lake.

[1] The toponyme "Lac Sergent" was formalized on December 5, 1968, at the Place Names Bank of the Commission de toponymie du Québec.