Greenhill is a surname. Notable people with the surname include:
Alfred George Greenhill (1847–1927), British mathematician Basil Greenhill (1920–2003), English diplomat, museum director and historian Catherine Greenhill, Australian mathematician Craig Greenhill (born 1972), Australian rugby league player David Greenhill (born 1985), Scottish footballer Denis Greenhill, Baron Greenhill of Harrow (1913–2000), British diplomat Elizabeth Greenhill (1615–1679), British mother of 39 children Elizabeth Greenhill (bookbinder), (1907–2006), English bookbinder Ernest Greenhill, 1st Baron Greenhill (1887–1967), Scottish politician Gary Greenhill (born 1985), Scottish footballer Sir George Greenhill (1847–1927), English mathematician Henry Greenhill (1646–1708), British mariner and politician Joe R. Greenhill (1914–2011), American attorney, chief justice of the Texas Supreme Court John Greenhill (–1676), English portrait painter John Russell Greenhill (–1813), English clergyman, owner of "Chequers" Joseph Greenhill (1704–1788), English clergyman and religious disputer Kelly M. Greenhill (born 1970), American political scientist Robert F. Greenhill (born 1936), American investment banker Sir Robert Greenhill-Russell, 1st Baronet (1763–1836), British Member of Parliament, owner of "Chequers" Thomas Greenhill (colonial administrator) (1611–1658), English colonial administrator, pioneer of the British East India Company Thomas Greenhill (surgeon) (1669–1740), British surgeon and author William Greenhill (1591–1671), English nonconformist clergyman and author William Alexander Greenhill (1814–1894), English physician, literary editor and sanitary reformer