William Kipsang

William Kipsang (* June 26, 1977 ) is a Kenyan marathon runner.

In 2003, he won the Amsterdam Marathon in 2:06:39 h and the following year at the same place second.

In 2005 he won the Seoul International Marathon, in which he was runner-up the year before. In the New York City Marathon in 2006, he finished seventh.

In 2007 he was third at the Rotterdam Marathon, and the following year he set up there with a 2:05:49 course record.