Washington Theological Union (WTU) is a Roman Catholic graduate school of theology and ministry in Washington, D.C. in the United States, with a mission of educating and forming candidates for the priesthood and other church ministries. The school was founded in 1968 and conducted its last formal graduation ceremony in May 2013. Administrative operations will continue until June 2015 so that remaining students pursuing their Doctoral degrees can complete their programs. Final degrees will be awarded in May 2015, completing 47 years of ministry formation in service to the Roman Catholic Church and other ecclesial bodies. Student records and archival history will be transferred to St. Bonaventure University (New York) in July 2015. WTU is accredited by the Association of Theological Schools in the United States and Canada (ATS), the Middles States Commission on Higher Education and was a member of the Washington Theological Consortium.
The school announced on June 27, 2011 that it did "not have the financial resources to be able to continue offering its academic services to the Church and the community beyond the 2012 - 2013 academic year" and it would stop admitting new students after September 2011.