Longyear is a surname. Notable people with the surname include:
Barry B. Longyear (1942–2025), American science fiction author and screenwriter Burton Orange Longyear (1868–1969), American botanist and forester John Munro Longyear (1850–1922), the founder of Longyearbyen John W. Longyear (1820–1875), U.S. Representative from Michigan Judith Q. Longyear (1938–1995), mathematician
See also Longyearbyen, the largest settlement in Norway's Svalbard archipelago Longyear Company, now known as Boart Longyear Longyear River, a river on the island of Spitsbergen in Svalbard, Norway Longyear Valley, a valley on the island of Spitsbergen in Svalbard, Norway