Just is a surname. Notable people with the surname include:
Alexander Just (1874-1937), German/Hungarian chemist and inventor Carl Just (1897-1990), Norwegian journalist Cassià Maria Just (1926-2008), Catalan abbot Elijah Just (born 2000), New Zealand footballer Ernest Everett Just (1883-1941), American biologist Florian Just (born 1982), German pairs skater Gabriele Just (born 1936), German chess player Gustav Just (1921-2011), East-German writer and editor Helen Just, British cellist (flourished 1920s-1960s) Jesper Just (born 1974), Danish artist Joe Just (1916-2003), American baseball player Johann August Just (c.1750-1791), German composer active in the Netherlands John Just (1797-1852), English archaeologist and botanist John Augustus Just (1854-1908), German-born American chemist and inventor Karsten Just (born 1968), East-German sprinter Klaus Just (born 1964), West-German sprinter Marcel Just, American psychologist and cognitive neuroscientist Myron Just (born 1941), American politician and farmer from North Dakota Paul Just (born 1964), German-born Canadian pole vaulter Theodore Just (1886-1937), British athlete Ward Just (1935-2019), American writer