Charles François Bailly de Messein (4 November 1740 – 20 May 1794) was a priest active in the British province of Quebec during the American Revolutionary War.

He is best known for his Loyalist activism during the American invasion of Quebec, when he was injured during the Battle of Saint-Pierre, and for publicly supporting a planned university that his bishop opposed.

He was admitted as a member of the board of directors of the seminary in December 1774,[1] the same year he wrote his paper Rhetorica in Seminario Quebecensi.

During American invasion of Quebec, Bailly travelled in the spring 1776 to the southern coast of the Saint Lawrence River, preaching fidelity to England to his compatriots.

In June 1786, Carleton was elevated to the peerage as Baron Dorchester and succeeded in imposing Bailly's candidature as coadjutor to the bishop of Quebec.