Junquillal Bay Wildlife Refuge, also called the Bahia Junquillal National Wildlife Refuge, is a 4.38 km2 (1.69 sq mi) wildlife refuge in Guanacaste Province of northwestern Costa Rica. It is a part of the Guanacaste Conservation Area and the Area de Conservación Guanacaste World Heritage Site. It protects areas of tropical dry forest and coastal mangroves.