Peter Kostis (born December 23, 1947 in Sanford, Maine) is an American golf analyst and instructor.
Kostis is a golf instructor. Among his many students are Paul Casey, Chez Reavie, Bernhard Langer, Steve Elkington, Dan Marino, Maury Povich, and Mike Schmidt. He has the Peter Kostis Learning Academy at Grayhawk Golf Club, Scottsdale AZ Kostis also was the instructor who coached Kevin Costner in the movie "Tin Cup".
In 1992, Kostis joined CBS Sports as an on-course reporter and golf analyst.. In addition to his CBS duties, he was from 1989-2004, the lead golf analyst for the USA Network.
He lives with his wife, Sandy, and their two children in Paradise Valley, Arizona.