Hookbill could refer to

• Hook Bill, a breed of domestic ducks
• the avicultural term for members of the parrot family (typically anything larger than a parakeet) based on the curved shape of the bill, distinguishing them from softbills and other birds such as doves and finches
• Lanaʻi hookbill (Dysmorodrepanis munroi) an extinct Hawaiian finch
• The chestnut-winged hookbill (Ancistrops strigilatus), of western Amazonia