Elba Esther Gordillo Morales (Spanish pronunciation: [elβaesˈteɾ ɣoɾˈðiʝo]; 6 February 1945) is a Mexican politician who has been the leader of the 1.4-million-strong National Education Workers' Union (Sindicato Nacional de Trabajadores de la Educación, or SNTE), the largest labor union in Latin America, since 1989. She was formerly affiliated with the Institutional Revolutionary Party (Partido Revolucionario Institucional, or PRI) until 2005, when she left and founded the New Alliance Party (Partido Nueva Alianza, or PANAL), which is currently led by Luis Castro Obregón.

Gordillo was arrested by the Mexican authorities on 26 February 2013 on charges of embezzlement and organized crime. She was included in a list of the "10 most corrupt Mexicans" published by Forbes in 2013.

Gordillo has held considerable influence over governments and individual presidents by persuading her union members to vote as a single bloc.