Louis-Eustache Chartier de Lotbinière (French pronunciation: [lwi østaʃ ʃaʁtje də lɔtbinjɛʁ]; December 14, 1688 – February 12, 1749), Seigneur de Lotbinière; Member of the Sovereign Council of New France; Keeper of the Seals of New France; Vicar-General, Archdeacon and the first Canadian-born Dean of Notre-Dame Basilica-Cathedral, Quebec.

Within the Sovereign Council of New France he quickly distinguished himself by his competence, integrity and innate sense of justice, and temporarily served as Attorney General.

De Lotbinière did not get the promotion, and in 1722, his antagonism with Bégon was again evident when the intendant wrote of him that he "thinks that he knows as much as the most diligent.

In 1717, he had started the construction of a large stone church at Lotbinière, with the help of his brother, Father Valentin, who was the parish priest there.

He resigned from the Compagnie de l'Occident, but Louis XV of France allowed him to retain his position on the Sovereign Council of New France as a lay councillor, on condition that he abstain from attending trials of criminal cases and relinquish his office as Keeper of the Seals.