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Betty Rosenquest Pratt (born April 15, 1925) was an American amateur tennis player in the 1940s, 1950s, and 1960s.

Pratt was a student at Florida's Rollins College where she played collegiate tennis, graduating in 1947. She was ranked in the Top Ten in the U.S. in 1951 (ranked number eight), 1954 (number five) and 1956 (number five). She was a semi-finalist in both singles and doubles at Wimbledon in 1954. At the U.S. Nationals, she was a doubles finalist and singles semi-finalist in 1956.

At the tournament in Cincinnati, Pratt won the singles title in 1947 (over Betty Hulbert James in the final) and was a doubles finalist (with Margaret Varner) in 1948.

She captained both the U.S. Wightman Cup team and the U.S. Federation Cup Team.

Pratt continued to win titles at seniors events into her 60s and 70s. She has been inducted into the Florida Tennis Association Hall of Fame (1979), was a charter member of the Rollins College Sports Hall of Fame (1997), and has been inducted into the Eastern Tennis Association Hall of Fame (1998).