St. Joseph's Seminary (Washington, D.C.)

St. Joseph's Seminary is a former Catholic major seminary and current house of formation in Washington, D.C. for the Society of St. Joseph of the Sacred Heart (also known as the Josephites), a Catholic society of apostolic life that serves African Americans. The seminary was the first in the United States to accept Black men into formation for the Catholic priesthood and religious life.

St Joseph's was originally founded in Baltimore, Maryland in 1888 by Fr John R. Slattery for the Mill Hill Missionaries, from which the Josephites became independent 5 years later. The Josephite iteration of the seminary was relocated to DC in 1930.

The seminary property was listed in the National Register of Historic Places in September 2022.