Pierre Louis Albert Decrais (18 December 1838 – 27 February 1915) was a French lawyer, administrator, diplomat and politician who was a deputy from 1897 to 1903, then a senator from 1903 to 1915.
He was Minister of the Colonies from 1899 to 1902.
He supported the exploitation of the colonies by concessionary companies, and opposed the slave trade.
During his term in office a volcanic eruption destroyed the city of Saint-Pierre, Martinique.