Mary Proctor (1862 – September 11, 1957) was an American popularizer of astronomy. Although frequently stated to be an American astronomer, she was in fact English, and remained so through out her life. At least one source (c1924) gives nationality as English. She was born in Dublin, Ireland, the daughter of Mary and Richard Proctor. They emigrated to the United States in 1882. Her father was a British popularizer of astronomy, and she gained her knowledge of the subject from him. She authored many articles for newspapers and journals, and wrote a number of popular books.