Sainte-Eulalie (French pronunciation: [sɛ̃t ølali] ⓘ) is a municipality in the Nicolet-Yamaska RCM in the Centre-du-Québec region of Quebec, Canada, situated at the crossroads of Autoroutes 55, 20 and 955.

The population as of the Canada 2021 Census was 984.

Sainte-Eulalie is also the home of Hydro-Québec's Nicolet static inverter station along Autoroute 20, west of its junction with Autoroute 55, as part of its HVDC Quebec - New England Transmission circuit.

Population trend:[5] Mother tongue language (2021)[6]