María Esther Orozco Orozco (born 18 April 1945 in San Isidro Pascual Orozco, Chihuahua, Mexico) is a Mexican chemist, bacteriologist, parasitologist and teacher. Her research in the Centro de Investigación y de Estudios Avanzados del IPN (México) is focused on the molecular biology and genetics of Entamoeba histolytica, mainly in the genes and proteins that drive the virulence mechanisms of this human parasite, willing to develop a vaccine and more efficient treatments against amoebiasis.