Wesley Korir (born 15 November 1982, in Kitale, Trans-Nzoia District) is a former Kenyan elected Member of Parliament for Cherangany Constituency (4 March 2013- 31 August 2017) and a long distance runner who specializes in road running competitions.
On 16 April 2012, he won the Boston Marathon with a time of 2 hours 12 minutes 40 seconds.
He had previously won the Los Angeles Marathon in 2009 and 2010, the first back-to-back winner there in eight years.
He took second place in the 2011 Chicago Marathon in a personal-record time of 2 hours 6 minutes 15 seconds, and improved that personal record by 2 seconds in the 2012 Chicago Marathon.
In March 2013, Korir was elected to a seat in the Kenyan National Assembly.