Guayas 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 3 million people, it is the most populous province in Ecuador. It is the fourth largest province in the country in terms of area. The largest city of Ecuador, Guayaquil, is located within the province.