Louise Evelina du Pont Crowninshield (August 3, 1877 – July 11, 1958) was an American heiress, historic preservationist, and philanthropist. She was the great-granddaughter of Éleuthère Irénée du Pont, founder of E. I. du Pont de Nemours and Company. Her estate at Eleutherian Mills near Wilmington, Delaware became the Hagley Museum and Library in 1957.
