Kimberly Po-Messerli (born October 20, 1971, in Los Angeles, California) is a former professional tennis player from the United States.
During her career, Po won the mixed doubles title at Wimbledon in 2000 (partnering Donald Johnson). She was also a women's doubles runner-up at the US Open in 2001 (partnering Nathalie Tauziat), and a mixed doubles runner-up at the US Open in 1999 (partnering Johnson).
Po won a total of six top-level doubles titles. Her career high world rankings were World No. 6 in doubles (in 2001) and World No. 14 in singles (in 1997). Her best singles performance at a Grand Slam event came at the Australian Open in 1997, when she reached the quarter-finals before being knocked-out by Amanda Coetzer.
Po married Oliver Messerli in 2001, and henceforth was known for the rest of her career as Kimberly Po-Messerli.