Debra Meloy Elmegreen (born November 23, 1952 in South Bend, Indiana) is an American astronomer.
She was the first woman to graduate from Princeton University with a degree in astrophysics, and she was the first female post-doctoral researcher at the Carnegie Observatories.
Since 1985, she has been a professor of astronomy at Vassar College.
She wrote an astronomy textbook published by Prentice Hall in 1997.
She served as president of the American Astronomical Society from 2010-2012, and on August 30, 2018 was named President-elect of the International Astronomical Union (IAU) at the group’s 30th triennial General Assembly in Vienna, Austria.