Lac-Casault () is an unorganized territory in the Bas-Saint-Laurent region of Quebec, Canada.
The small eponymous Lake Casault is located near the village of St-Alexandre-des-Lacs and was named in honour of Louis-Napoléon Casault (1823âÂÂ1908).
Population trend:
Private dwellings occupied by usual residents: 24 (total dwellings: 142)
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