Florence Ballin
Florence A. Ballin was a female tennis player from the U.S. She played in the mixed doubles in the early 1900s. She made it to three US Open finals with Bill Tilden.
Career
In 1915 Ballin reached the doubles final at the US Indoor Championships, playing with Molla Bjursted.Ballin reached the final of the mixed doubles competition at the U.S. National Championships on three occasions. Each time she partnered with multiple champion Bill Tilden but they lost all three finals.
In 1919, she wrote a tennis book titled Tennis for Girls.
In 1920, she won the women's championships of New Jersey and Long Island. She won the women's lawn tennis championship of Pennsylvania and Eastern States in 1922 defeating Anne Townsend in straight sets.
Grand Slam finals
Mixed doubles (3 runners-up)
| Outcome | Year | Championship | Surface | Partner | Opponents | Score |
| Runner-up | 1916 | U.S. Championships | Grass |  Bill Tilden | Eleonora Sears Willis E. Davis | 4–6, 5–7 |
| Runner-up | 1917 | U.S. Championships | Grass | Bill Tilden |  Molla Bjurstedt Irving Wright | 12–10, 1–6, 3–6 |
| Runner-up | 1919 | U.S. Championships | Grass | Bill Tilden | Marion Zinderstein Vincent Richards | 6–2, 9–11, 2–6 |