Peter Vanderkaay (born 12 February 1984), nicknamed PVK, is an American competitive swimmer who competes in middle-distance freestyle events and is a four-time Olympic medalist. He was a member of the 2012 Olympic team, and won a bronze medal in the 400-meter freestyle event at the 2012 London Olympics. Vanderkaay's 3 brothers are also competitive swimmers.
Vanderkaay holds a total of six NCAA titles and won a silver and two bronze medals at the 2003 World University Games. He won an NCAA title in the 500 and placed second in both the 200-yard and 1650-yard freestyle events at the NCAA championships.
At the 2004 Athens Olympics, Vanderkaay was a member of the 4×200-meter freestyle relay team with Michael Phelps, Ryan Lochte, and Klete Keller that beat the favored Australian team. Vanderkaay won his first individual medal, a bronze, in the 200-meter freestyle at the 2008 Beijing Olympics. Vanderkaay was part of the 4×200 meter freestyle relay that set the world record. At the 2012 London Olympics, Vanderkaay won a bronze medal in the 400-meter freestyle with a time of 3:44.69, finishing third behind Sun Yang and Park Tae-Hwan.