A fishhook is a device for catching fish. Fishhook or fish hook may also refer to:
Geography Antarctica: Fishhook Ridge, a ridge on the east side of Sobral Peninsula
Cambodia: Fishhook (Cambodia), a salient of Kampong Cham Province that protrudes into Vietnam
United States: Fishhook, Alaska, a census-designated place (CDP) in Matanuska-Susitna Borough Fishhook, Illinois, an unincorporated town in Pike County Fishhook Lake, a lake in Minnesota Fish Hook River, a tributary of the Shell River in Minnesota Fishhooks Wilderness, a wilderness area in Arizona
Botany Fishhook cactus, a name for any hook-spined species of the genus Mammillaria Fishhook barrel cactus (Ferocactus wislizeni), a hook-spined cylindrical cactus Fishhook waterflea (Cercopagis pengoi), a species of planktonic crustacean
Other uses Fish-hooking, a martial-arts technique Fish Hooks, an American animated television series Strict conditional, a mathematical conditional marked with the logic symbol ⥽ Fishhook R, the informal name of the symbol for the alveolar tap in the International Phonetic Alphabet Jack (playing card), in poker Lari (fish hook money), objects serving as coins in areas around the Arabian Sea Samuel "Fish Hook" Mulford, a colonial New York legislator and merchant A common opening move in the game of Othello (game)