Susan Diana Barham Noel-Powell (8 June 1912 – October 1991) was an English squash and tennis player. Noel was taught to play squash and tennis by her father E.B (Evan Baillie) Noel, a successful racquets player in his own right.
Noel won the British Open three times in a row from 1932 to 1934. She won the final in straight sets on all three occasions. She was also the runner-up at the championship in 1939, when she lost to Margot Lumb.
Noel also won the US National Championships in 1933. She also captured the Atlantic Coast Women's Squash Championships title in 1933, defeating Cecily Fenwick in the final.
Partnering Jadwiga Jędrzejowska, Noel finished runner-up in the women's doubles at the French Championships in 1936. Noel and Jędrzejowska lost in the final Simonne Mathieu and Billie Yorke 2–6, 6–4, 6–4.