Robert Day
Robert Day may refer to:
- Robert Day (cartoonist)
- Robert Day (antiquarian) (1836–1914), Irish antiquarian and photographer
- Robert Day (director) (born 1922), English film director
- Robert Day (Irish politician) (1885–1949), Irish Labour Party politician from Cork
- Robert L. Day (1920–1999), mayor of Boise, Idaho
- Robert Day (footballer) (born 1944), former Australian rules footballer
- Robert Addison Day (born 1943), businessman
- Robert Andrew Day (born 1982), American basketball player
- Robert H. Day (1867–1933), lawyer and judge in Ohio