Daniel Harrington or Dan Harrington may refer to:
Daniel C. Harrington (1849–?), American sailor who won the Medal of Honor for his actions in the American Civil War Daniel J. Harrington (1940–2014), American Roman Catholic theologian and academic Dan Harrington (born 1945), professional poker player Dan Harrington (politician) (born 1938), Montana state senator Dan Harrington (footballer) (born 1953), former Australian rules footballer