Chris Evert was the first woman to win 6 US Open titles in the Open Era. 4 of those came back-to-back from 1975 to 1978 before adding two more in 1980 and 1982.
Serena Williams matched Evert's tally with her win in 2014. It was her third consecutive title having won three titles earlier in 1999, 2002 and 2008.
Steffi Graf is the third-most successful woman at the US Open. She made two successful title defenses at the major during her career. Graf won the titles in 1988, 1989, 1993, 1995 and 1996 .
Martina Navratilova with her 4 titles occupies the 4th spot on the list. The 18-time major winner in singles emerged victorious in the Flushing Meadows in 1983, 1984, 1986 and 1987.
Margaret Court with three titles in the Open Era at the US Open sits 5th on the list. She won two titles in the Amateur Era as well taking her entire tally to 5 titles.