William Kiplagat

William Kiplagat ( born June 21, 1972) is a Kenyan marathon runner.

Even on his debut he made as a third party in the Amsterdam Marathon in 1999 with 2:06:50 h his personal best. In 2000 he was fourth at the London Marathon in 2001 third in Prague and at the Berlin Marathon, and in 2003 he won the Rotterdam Marathon in 2:07:42 and finished fourth in Amsterdam in 2:07:50.

In 2005 he won the JoongAng Seoul Marathon, and in 2007 he was second in the Lake Biwa Marathon.

At the World Athletics Championships in 2007, he finished eighth.