Marjorie Dodd Letts (January 14, 1889– August 1968) was an important amateur tennis player and golfer in the early part of the 20th century.

Playing at a time when there were no women's rankings, she was nonetheless one of the best ever to come out of the Midwest Section of the United States Tennis Association (known then as the Western Section).

One of her most notable victories came in the 1921 U.S. Women's Amateur Championship when she defeated Cecil Leitch, called by The New York Times "the greatest golfing woman the world has ever seen."

She also won two Chicago team championships with Mrs. Melvin Jones of Olympia Fields, Illinois.

Dodd married Frederick Clayton Letts, Jr., on February 5, 1916, and the couple divorced on November 12, 1930.