Susan Mascarin Keane, born Susan Mascarin (born June 28, 1964) is a retired tennis player from the U.S. Her best singles result in a Grand Slam was the 1984 US Open, where she advanced to the fourth round.

Born in Grosse Pointe Shores, Michigan, Mascarin was the US Open Girls' Singles champion in 1980.

Outcome	No.	Date	Tournament	Surface	Opponent	Score
Runner-up	1.	August 15, 1982	Atlanta, Georgia, U.S.	Hard	Chris Evert	3–6, 1–6

Outcome	No.	Date	Tournament	Surface	Partner	Opponents	Score
Winner	1.	March 30, 1986	Phoenix, Arizona, U.S.	Hard	Betsy Nagelsen	Linda Gates Alycia Moulton	6–3, 5–7, 6–4
Runner-up	2.	October 19, 1986	Tokyo, Japan	Clay	Betsy Nagelsen	Sandy Collins Sharon Walsh	1–6, 2–6

• Susan Mascarin at the Women's Tennis Association
• Susan Mascarin at the International Tennis Federation
• Sue Mascarin at Wimbledon

Sporting positions
Preceded by Kathleen Horvath	Orange Bowl Girls' Singles Champion Category: 18 and under 1980	Succeeded by Penny Barg