William Ramsay (disambiguation)

William Ramsay (1852–1916) was a Scottish chemist who discovered the noble gases.

William Ramsay may also refer to:
 * William Ramsay (astrologer) (fl. 1660), English physician and astrologer
 * William Maule, 1st Baron Panmure (1771–1852), Scottish peer (until 1782 named the Hon. William Ramsay)
 * Bill Ramsay (born 1929), American jazz saxophonist and band leader based in Seattle
 * Bill Ramsay (politician) (born 1962), politician in Newfoundland, Canada
 * Bill Ramsay (athlete) (1928–1988), Australian athlete
 * William Ramsay (classical scholar) (1806–1865), professor of humanity in the University of Glasgow 1831–63
 * William Ramsay (MP) (1809–1850), Scottish MP for Midlothian and Stirlingshire
 * William Mitchell Ramsay (1851–1939), Scottish archaeologist and New Testament scholar
 * William Ramsay (manufacturer) (1868–1914), Australian manufacturer who invented Kiwi shoe polish
 * William Ramsay, 1st Earl of Dalhousie (died 1672), Scottish nobleman, army officer and politician
 * William Norman Ramsay (1782–1815), Scottish cavalry officer in the British Army, killed in action at Waterloo
 * William Ramsay (Royal Navy officer) (1796–1871), Scottish admiral in the Royal Navy