Born Marian Rogers into a family of railroad workers, she was a Catonsville native and a 1947 Catonsville High School graduate.
At age 17 she joined the B&O; as a car department clerk. She transferred to the railroad's public relations department in 1961.
In 1964, when city officials staged a 150th anniversary Star-Spangled Banner Celebration, the West Pratt Street museum reopened after a period of closure. Mrs. Smith worked in the gift shop and in 1971 was named supervisor of what was then called the Baltimore & Ohio Transportation Museum. She retired in 1991.
Mrs. Smith occasionally dressed in period costumes for historic re-enactments. She started weekend train rides and rentals of the museum for parties and events. She led tours and supervised the museum staff.
"She was a really good public relations person. She could put on a show," said Anne Calhoun, the museum's former reference librarian and a friend. "She did as much as she could with as little as she had. She had friends in high places in the railroad."
Mayor Kurt L. Schmoke proclaimed June 1, 1991, Marian Smith Day.
She was also a hostess at the Westview Lounge.
Services were held Tuesday in Catonsville.
Survivors include a great-niece, Rachel Piktel, and a great-great-nephew, Jacob Piktel, both of California, Pa. Her marriage to Charles Smith ended in divorce.