Mabel Esmonde Cahill (2 April 1863 – 2 February 1905) was an Irish female tennis player, active in the late 19th century, and was the first foreign woman to win a major tennis tournament when she won the 1891 US National Championships.

[3] There is strong evidence to suggest that Mabel and two of her sisters enrolled in Sacred Heart Convent Secondary School.

After school, Mabel moved from her family town of Ballyraggett to the city of Dublin in the year of 1886.

[5][6] Cahill became the first foreign woman to win a major tournament when she defeated Ellen Roosevelt in the 1891 US Championships women's final at the Philadelphia Cricket Club.

[10] Cahill also won multiple titles at other tournaments including the Middle States Championships ladies singles title four times consecutivley (1890–1893), the New Jersey State Championships (1890) held at South Orange, NJ, the Kilkenny County and City Tournament (1884, 1886) held at Kilkenny, Ireland Cahill also attempted to start a career as a writer during her time in America.