Trinity Washington University is a private Catholic university in Washington, D.C. The university was founded as Trinity College by the Sisters of Notre Dame de Namur in 1897 as the nation's first Catholic liberal arts college for women. Trinity was chartered by an Act of Congress on August 20, 1897. It became Trinity Washington University in 2004.

The Sisters of Notre Dame de Namur are a Catholic institute of religious sisters, founded to provide education to the poor.