Gertrude Levin Marcus (1885-1955) was the founder and president of the Salt Lake City Unit of the Women's National Aeronautical ASsociation and wife of Salt Lake City mayor Louis Marcus.

Gertrude Levin Marcus was born in 1885 in Chicago, Illinois to Hyman and Jennie Shocken Levin. She lived in Pueblo, Colorado until her marriage to Louis Marcus in Salt Lake City, Utah on January 16, 1912. On April 22, 1919, she gave birth to Louis Howard Marcus, her only child.

Along with managing her household and raising her son, she was the founder and president of the Salt Lake City Unit of the Women's National Aeronautical Association, was one of the founders of the Town Club, and was a supporter of the Garden Club, as well as being a member of the Alta Club and the Salt Lake Country Club. Later she became a member of the board of directors of the Neighborhood House, as well as sponsored and supervised construction of the Neighborhood House Thrift Shop. She was commonly referred to in business correspondence and newspaper articles as Mrs. L. Marcus or Mrs. Louis Marcus.

She died on May 25, 1955 in Salt Lake City, Utah.