Loes Markerink (born 14 December 1985 in Delfzijl) is a road cyclist from the Netherlands. She won at the 2003 UCI Road World Championships the junior women's road race and finished second in the women's junior time trial. As a senior, she has won a stage in several stage races: Tour de Bretagne, Damesronde van Drenthe, Grande Boucle Féminine Internationale, Holland Ladies Tour and GraciaâÂÂOrlová.