Catherine Dunlop MacKenzie (c. 1894 – 24 October 1949)[1] was a Canadian-born journalist who worked in New York City.

[2][3] Baddeck was the site of Alexander Graham Bell's summer home, and towards the end of his life he spent increasing time there conducting experiments.

For the eight years preceding Bell's 1922 death, MacKenzie worked as his personal secretary and research assistant.

[4] By 1929,[5] MacKenzie had moved to New York City where she initially found work writing a series of newspaper and magazine articles about her home province of Nova Scotia, which were paid for by the provincial government.

[2] In 1947, she received the Lasker Award for her work on mental illness, in relation to her regular "Parent and Child" column.