Boit or Boiţ is a surname. Notable people with the surname include:
Charles Boit (1662–1727), Swedish painter Cristina Boiț (born 1968), Romanian discus thrower Elizabeth Boit (1849–1932), American textile manufacturer Mike Boit (born 1949), Kenyan middle-distance athlete Philip Boit (born 1971), Kenyan cross-county skier Wilson Boit Kipketer (born 1973) Kenyan middle and long-distance athlete