The Régiment de Béarn was a French Army regiment active in the 18th century.
It is principally known for its role in the Seven Years' War, when it served in the North American theatre.
On July 31, 1759, the battalion took part in the victorious battle of Beauport where it guarded the extreme left near the cataract of the Montmorency River with the grenadiers.
On September 13, 1759, they were present during the siege of Quebec City, with the exception of 35 soldiers who were sent to Fort Niagara.
On October 28, the piquets and grenadiers of the regiment retired from Pointe-aux-Trembles (actual Neuville).