Wilson Onsare Ombui (born 15 June 1976) is a Kenyan former long-distance runner who competed in half marathon and marathon races.
His time of 2:06:47 hours at the 2003 Paris Marathon made his fastest ever debut run at the time, but he never bettered the mark.
His other marathon highlights included a runner-up performance at the 2005 Boston Marathon and a third-place finish at the Lake Biwa Marathon in Japan.
His best time for the half marathon was 1:00:52 hours, and he had victories over that distance at the Paris Half Marathon, America's Finest City Half Marathon, and Reims Half Marathon.