Primero de Mayo

Primero de Mayo is Spanish for the First of May. It may refer to:


 * Primero de Mayo Bay (now known as Fumarole Bay), Deception Island, South Shetland Islands, Antarctica
 * Primero de Mayo Department, Chaco Province, Argentina
 * Primero de Mayo, Entre Ríos, village and municipality in Argentina
 * Primero de Mayo (Los Mangos), settlement in Pueblo Viejo Municipality, Veracruz, Mexico
 * Avenida Primero de Mayo, a major road in Bogotá, Colombia
 * ARA Primero de Mayo, first Argentine exploration ship in the Melchior Islands, Antarctica
 * Club Primero de Mayo, Bolivian football club from Trinidad, Beni, promoted in the 2008 Copa Simón Bolívar
 * Club Social, Cultural y Deportivo Primero de Mayo, football club in Guaranda, Bolívar Province, Ecuador
 * Grupo Primero de Mayo, anti-Franco resistance movement in Spain