David Mejia
 David Mejía Hernández (born December 7 1986 in Toluca) is a Mexican race walker. He set his personal best time of 1:22:36 by finishing third in the men's 20 km at the 2011 IAAF Race Walking Challenge in Chihuahua Mexico.Mejia represented Mexico at the 2008 Summer Olympics in Beijing where he competed in the men's 20 km race walk along with his compatriot Eder Sánchez.