Demajagua or La Demajagua may refer to:
Places Demajagua, a barrio in the municipality of Fajardo, Puerto Rico La Demajagua, Isle of Youth, a village in the Isle of Youth, Cuba La Demajagua (memorial), a historical memorial related to the Ten Years' War near Manzanillo, Cuba
Other La Demajagua (newspaper), a Cuban newspaper The flag of La Demajagua, a historical revolutionary flag of Cuba still in use as its naval jack.