Kate Ziegler (born June 27, 1988 in Fairfax, Virginia) is a world record distance swimmer from the United States, who won two golden medals at the 2005 World Aquatics Championships in Montréal and the same two events at the 2007 World Aquatics Championships in Melbourne. She holds the world record in the 1500 m freestyle. She is coached by Ray Benecki, and for the team "FISH". Due to her performance at the World Championships, in which she came first in the 800 and 1500 m freestyle, she was selected for the USA "A" national team. Ziegler made her international debut at the 2004 FINA Short Course World Championships in Indianapolis. She graduated from Bishop Denis J. O'Connell High School on June 1, 2006. Ziegler currently attends George Mason University.