William Thomson

William, Billy or Bill Thomson may refer to:

Military

 * William Thomson (American soldier) (1727–1796), American militia captain in Capture of Savannah
 * William Taylour Thomson (1813–1883), British military officer and diplomat
 * William Montgomerie Thomson (1877–1963), British general and commander of the British expeditionary force in north Persia
 * William McKenzie Thomson (1898–1987), Canadian World War I pilot

Politics

 * William Thompson (Ipswich MP), Solicitor General for England and Wales, 1717–1720
 * William Alexander Thomson (1816–1878), Canadian author and politician
 * William Thomson (politician) (1818–1866), Member of Parliament in Christchurch, New Zealand
 * William Mitchell-Thomson, 1st Baron Selsdon (1877–1938), British politician

Religion

 * William Thomson (writer) (1746–1817), Scottish minister and historian
 * William Aird Thomson (1773–1863), Scottish minister and antiquarian
 * William McClure Thomson (1806–1894), American missionary and writer
 * William Thomson (bishop) (1819–1890), Archbishop of York, 1862–1890
 * William Burns Thomson (1821–1893), Scottish medical missionary

Science

 * William Thomson (mineralogist) (1760–1806), English physician and geologist
 * William Thomson (physician) (1802–1852), Scottish author and professor of medicine
 * William Thomson (surgeon) (1843–1909), Irish surgeon
 * William Thomson, 1st Baron Kelvin (1824–1907), Scots-Irish physicist
 * William Johnston Thomson (1881–1949), Scottish engineer and businessman

Sports

 * William Thomson (Dumbarton footballer) (fl. 1891–1901), Scottish footballer (Dumbarton, Scotland)
 * William Thomson (Dundee footballer) (1874–1917), Scottish footballer (Dundee, Bolton Wanderers, Scotland)
 * William Thomson (rugby union) (1880–1942), Scottish international rugby union player
 * Bill Thomson (cricketer) (1943–2019), New Zealand cricketer and hockey player
 * Billy Thomson (footballer, born 1895), Scottish football wing half for Bristol Rovers and Leicester City
 * Billy Thomson (footballer, born 1958) (1958–2023), Scottish goalkeeper for St Mirren, Dundee United, Motherwell, Dundee and Scotland
 * Bill Thomson (ice hockey) (1914–1993), Canadian ice hockey player

Other

 * William Thomson (artist) (1926–1988), British artist
 * William Thomson (musicologist) (died 1753), Scottish folk song collector and singer
 * William John Thomson (1771–1845), American artist
 * W. H. Seward Thomson (1856–1932), U.S. federal judge
 * William Thomson (mathematician) (1856–1947), Scottish mathematician
 * William Thomas Thomson (actuary) (1813–1883), Scottish actuary
 * William James Thomson (1857–1927), Canadian artist and engraver
 * William Ennis Thomson (1927–2019), music school dean
 * Bill Thompson (voice actor)