Margaret Whittaker Moodey (December 1862 – January 17, 1948) was an American scientific curator affiliated with the United States National Museum (later the National Museum of Natural History).

[3][4] She and Edgar T. Wherry were assistant authors of George Perkins Merrill's Handbook and Descriptive Catalogue of the Collections of Gems and Precious Stones in the United States National Museum (1922).

"[4] Pictures of Moodey peering into a microscope were published in newspapers and magazines across the United States during this time.

As a "fitting finale to her Museum endeavors",[10] she was co-author with Ray S. Bassler of Bibliographic and Faunal Index of Paleozoic Pelmatozoan Echinoderms (1943).

[14][15] She lived with her niece, Helen M. Coolidge, a high school principal,[16] before she died in 1948, aged 85 years.