Guayas may refer to:
*
Guayas River
The Guayas River (Rio Guayas) is a major river in western Ecuador. It gives its name to the Guayas Province of Ecuador. Its total length, including the Daule River, is 389 km (241 mi). The Guayas River's drainage basin is 34,500 km2 (1 ...
, Ecuador
*
Guayas Province
Guayas (, ) is a coastal Provinces of Ecuador, province in Ecuador. It is bordered to the west by Manabí Province, Manabí, Santa Elena Province, Ecuador, Santa Elena, and the Pacific Ocean (as the Gulf of Guayaquil); to the east by Los Ríos ...
, Ecuador
*
BAE ''Guayas'', ships of the Ecuadorian navy
*
Guayas (chief), a legendary chief of the Huancavilcas in the coastal plains of modern Ecuador
*The fruit of the
mamoncillo
''Melicoccus bijugatus'' is a fruit-bearing tree in the soapberry family Sapindaceae, native or naturalized across the New World tropics including South and Central America, and parts of the Caribbean. Its stone-bearing fruits, commonly called ...
tree
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