Barbara "Mary Lucy" Dosh (September 15, 1839 – December 29, 1861) was a Catholic sister in the order of the Sisters of Nazareth.
She was a volunteer nurse in Western Kentucky during the American Civil War, caring for both Union troops and Confederate prisoners of war, and died in the course of duty from typhoid fever.
In 2012, the United States Congress passed a resolution honoring Dosh's nursing care given to both Union and Confederate soldiers.