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

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

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

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

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

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