St. Mary's Academy is a Roman Catholic all-girls high school located in Portland, Oregon, United States.

They traveled from Montreal via ship and rail to Fort Vancouver where Blanchet had established a school on property he purchased from Daniel H. Lownsdale in 1857.

St. Mary's opened in the same location with six female students (three Catholic, two Jewish, one Protestant) on Monday, 7, 1859, 12 days after they reached Portland.

[6] In August 2015, St. Mary's rescinded a job offer it made to Lauren Brown in April to work as a college guidance counselor.

School officials said she had told them she intended to enter into a same-sex marriage, while Brown said she asked if doing so would affect her employment.

[7] A statement was released by the school to parents and alumnae, stating that the hiring reversal was "due to a conflict with current Catholic teachings regarding same-sex marriage.