William Harvey (1578–1657) was an English physician who made the first exact description of blood circulation.
William, Will, Willie, Billie or Bill Harvey may also refer to:
British Members of Parliament
- William Harvey (1663–1731), MP for Appleby, Essex, Old Sarum, and Weymouth and Melcombe Regis
- William Harvey (1689–1742), MP for Old Sarum
- William Harvey (1714–1763), MP for Essex
- William Harvey (1754–1779), MP for Essex
- W. E. Harvey (William Edwin Harvey, 1852–1914), MP for North East Derbyshire 1907–1914
- Bill Harvey (footballer, born 1896) (1896–1972), English footballer (Sheffield Wednesday, Birmingham, Southend), manager (Birmingham, Chesterfield, Gillingham) and cricketer
- Bill Harvey (footballer, born 1908) (1908–1978), English footballer for Barnsley, Chesterfield and Darlington
- Bill Harvey (footballer, born 1920) (1920–2002), English footballer and manager of Luton Town and Grimsby Town
- Willie Harvey (footballer) (1929–2014), Scottish footballer
- William Harvey (officer of arms) (1510–1567), English herald and Norroy King of Arms
- William Harvey (Bible Christian) (1787–1870, English cotton mill owner, deacon, and activist
- William Henry Harvey (1811–1866), Irish botanist
- William Hope Harvey (1851–1936), "free silver" activist
- Will Harvey (born 1966/67), American software developer and businessman
- William Frederick Harvey (1873–1948), director of the Central Research Institute in India, vice president of the Royal Society of Edinburgh
- W. F. Harvey (William Fryer Harvey, 1885–1937), English writer