Patti O'Reilly (born January 18, 1968) is an American former professional tennis player.

[1] The triplets, who had three others siblings, were raised in Ridgewood, New Jersey and graduated from Ridgewood High School in 1986, before moving on to play college tennis together for Duke University, with all three also competing on the WTA Tour.

[2][3] While at Duke University she was named four times on the All-ACC team and was the ACC Player of the Year in 1990.

[4] A left-handed player, unlike her sisters, O'Reilly was the highest ranked of the trio on the professional tour, peaking at 206 in the world in 1993.

As a doubles player she featured in the main draw of all four grand slam tournaments.