Kathy Rinaldi-Stunkel (born March 24, 1967) is an American former professional tennis player, who retired in September 1997.

In her career she won three singles and two doubles titles on the WTA Tour, and reached the semifinals of the 1985 Wimbledon Championships.

The recipient of WTA Most Impressive Newcomer Award in 1981 and WTA Comeback Player of the Year Award in 1989, she had career wins over top players such as Steffi Graf, Jana Novotná, Sue Barker, Pam Shriver, Hana Mandlíková, Wendy Turnbull, Manuela Maleeva, Dianne Fromholtz, Helena Suková, Claudia Kohde-Kilsch, Zina Garrison, Sylvia Hanika, Kathy Jordan, Jo Durie, and Natasha Zvereva.

After the 1987 French Open, she suffered a freak injury in Monte Carlo, slipping on stairs, and in trying to catch herself, fracturing her right thumb.

In December 2016, Rinaldi was appointed as the captain of the United States Fed Cup team, succeeding Mary Joe Fernandez.