Guanacaste

Guanacaste can refer to:


 * Guanacaste, the common tropical American tree Enterolobium cyclocarpum

Belize

 * Guanacaste National Park (Belize), a small national park in Belize

Costa Rica

 * Guanacaste Province, a province of Costa Rica
 * Guanacaste National Park (Costa Rica), a small national park in Costa Rica
 * Guanacaste Cordillera a mountain range in Costa Rica