William Kiplagat (born June 21, 1972) is a long-distance runner from Kenya.
He ran his personal best of 2:06:50 hours in the 1999 Amsterdam Marathon.
In 2009 he finished third in the Frankfurt Marathon with a fast time (2:07:05 hours), even though he was quoted as saying he is now more like a coach than a runner.
[1] He is an uncle to Florence Kiplagat, another Kenyan international level runner.
This Kenyan biographical article relating to athletics is a stub.