Rita Jeptoo (born 15 February 1981) is a Kenyan marathon runner. Originally a winner of the Boston Marathon three times, including setting the then course record at 2:18:57 in 2014, she had also won marathons in Chicago, Stockholm, and Milan, as well as having represented Kenya in the event at the 2007 World Championships in Athletics. She was the bronze medalist at the 2006 IAAF World Road Running Championships.