Zihuatanejo, and/or Ixtapa-Zihuatanejo, is the fourth largest city in the Mexican state of Guerrero. It was known by 18th-century English mariners as Chequetan and/or Seguataneo. Politically the city belongs to the municipality of Zihuatanejo de Azueta in the western part of Guerrero, but both are commonly referred to as Zihuatanejo. It is on the Pacific Coast, about 240 km northwest of Acapulco. Zihuatanejo belongs to a section of the Mexican Pacific Coast known as the Costa Grande.