Notable people named Treat include:

Given name Treat Huey (born 1985), American tennis player Treat Baldwin Johnson (1875–1947), American chemist Treat Williams (1951–2023), American actor

Surname Charles H. Treat (1842–1910), American politician, son of Nathaniel Treat Cornelius Mortimer Treat (1817–1916), American politician Herb Treat ( 1900–1947), American football player Howell B. Treat (1833–1912), American Civil War soldier awarded the Medal of Honor John Whittier Treat, Professor of East Asian Languages and Literature at Yale University Joseph B. Treat (1836–1919), American politician Lawrence Treat (1903–1998), American mystery writer Mary Treat (1830–1923), American naturalist Nathaniel Treat (1798–1894), American politician, father of Charles Treat Nathaniel B. Treat (1839–1930), American businessman and politician Payson J. Treat (1879–1973), American Japanologist Richard Treat (1584–1669), American early settler Robert Treat (1622–1710), American politician Roger Treat (1906–1969), American writer Samuel Treat (1815–1902), American judge from Missouri Samuel Hubbel Treat Jr. (1811–1887), American judge from Illinois Sharon Treat (born 1956), American politician and attorney