Guayas (English: /ˈɡwɑːjəs/, Spanish: [ˈɡwaʝas] ) is a coastal province in Ecuador. It is bordered to the west by Manabí, Santa Elena, and the Pacific Ocean (as the Gulf of Guayaquil); to the east by Los Ríos, Bolívar, Chimborazo, Cañar, and Azuay; to the north by Los Ríos and Bolívar; and to the south by El Oro and the Pacific Ocean.
With a population of over 4 million people, it is the most populous province in Ecuador. In terms of area it is the seventh largest province in the country. The main port of Ecuador, Guayaquil, is located within the province.
