Sainte-Eulalie () 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.
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