[1] Campbell had graduated with a diploma from East High School in February 1922, and entered Ohio State University as an art major after her selection as Miss America.

[5] It would be the last time in Miss America history where "professional" (model, Dorothy Knapp) and "amateur" (West Philadelphia's Gladys Grenemeyer) winners would be judged as finalists against the "Inter-City" champion (Mary Katherine Campbell) and place as runners-up to the Miss America title.

Campbell entered her second successful attempt in the beauty pageant as Miss America competing in Atlantic City against a field of 74 other women from 36 states.

Campbell sang "My Buddy" on the B. F. Keith Circuit for several weeks, but, "You couldn't hear me past the third row," she explained.

She died in San Francisco county in 1990, aged 84, and was buried at Oak Grove Cemetery in Delaware, Ohio, next to her late husband.