Sister Mary Clarice, a member of her order, said no medical cause of death was determined.
Born Atlanta Dorothy Evans in Montgomery, Ala., she entered the Roman Catholic religious order the Oblate Sisters of Providence in 1939. She then received her new name, Sister Mary Loretto. She attended the Mount Providence Junior College in Halethorpe and earned a degree in education from St. Mary's College (now the University of St. Mary) in Xavier, Kan.
In 1942, she was named prefect and supervisor of boarding students and resident life at St. Frances Academy on East Chase Street. She then taught at St. Francis Xavier School in East Baltimore.
After assignments in Charleston, S.C., Alexandria, Va., and Mobile, Ala., she returned to Baltimore as principal of St. Frances Academy.
She later served at Our Lady of Divine Shepherd School in Trenton, N.J., where she also served as director of the Office of Black Catholics. In 2008, she retired as the director of religious education at St. Ambrose Parish in Northwest Baltimore.
A Mass of Christian burial will be offered at 7:30 p.m. Wednesday at Mount Providence Convent Chapel, 701 Gun Road in Halethorpe.
Survivors include nieces and nephews.