William Milne may refer to: William Milne (missionary) (1785–1822), British Protestant missionary to China Sir William Milne (politician) (1822–1895), South Australian wine merchant and politician William Milne (sport shooter) (born 1852), British sport shooter William J. Milne (educator) (1843–1914), American educator and administrator William Johnstone Milne (1892–1917), Canadian soldier William Milne (rugby union), Scottish rugby union player Billy Milne (1895–1975), Scottish footballer Willie Milne (1951–2023), Scottish golfer William Grant Milne (?–1866), Scottish botanist William Charles Milne, missionary to China Ross Milne (Canadian politician) (William Ross Milne), Canadian politician Sandy Milne (William Alexander Milne, born 1920), Scottish nationalist politician