William, Willie, Bill or Billy Watson may refer to:

Arts William Watson (songwriter) (1794–1840), English concert hall singer and songwriter William Watson (poet) (1858–1935), English poet William J. Watson (1865–1948), Scottish teacher and toponymist Billy Watson (actor) (1923–2022), American actor William Watson (writer) (1930–2005), also known as Bill Watson, Scottish writer William C. Watson (1938–1997), American actor Willie Watson (musician) (born 1979), American folk musician

Military William H. Watson (1815–1846), Mexican–American War soldier from Maryland, U.S. William Watson (sergeant) (1826–1906), in the Confederate States Army William Watson (surgeon) (1837–1879), in Pennsylvania Volunteers during the American Civil War William Thornton Watson (1887–1961), New Zealand officer in the Australian Imperial Force William E. Watson, military historian

Politics William Watson (16th century MP), MP for the City of York William Henry Watson (1796–1860), British politician and judge William Watson (New South Wales politician) (1815–1877), Australian politician William John Watson (1839–1886), Australian politician William T. Watson (1849–1917), American banker and governor of Delaware William W. Watson Sr., 19th century North Carolina politician William Watson (Australian politician) (1864–1938), Australian politician William McLean Watson (1874–1962), Scottish politician W. Marvin Watson (1924–2017), U.S. postmaster general William Watson, mayor of Rockford, Illinois, U.S., 1878–79

Science William Watson (scientist) (1715–1787), English physician and scientist William Watson (physician) (1744–1824), English physician and naturalist William Watson (surveyor and scientist) (1784–1857), cartographer and sundial-maker from Seaton Ross William Livingstone Watson (1835–1903), Scottish East India merchant and astronomer Watson Cheyne or Sir William Watson (1852–1932), 1st Baronet Cheyne, Scottish surgeon and bacteriologist William Watson (botanist) (1858–1925), British botanist and horticulturalist William Watson (physicist, born 1868) (1868–1919), British physicist William Watson (Scottish physicist) (1884–1952), FRSE Scottish physicist and mathematician William Weldon Watson (1899–1992), American nuclear physicist

Sports Association football William Watson (footballer, born 1873) (1873–1929), Scottish footballer (Falkirk FC and Scotland) Billy Watson (footballer, born 1890) (1890–1955), English international footballer with Burnley, 1908–1925 Billy Watson (footballer, born 1893) (1893–1962), English footballer with Huddersfield Town, 1912–1927 William Watson (footballer, fl. 1903–1909), Lincoln City footballer active in the 1900s Bill Watson (footballer, born 1899) (1899–1969), English footballer in the 1920s–30s Bill Watson (footballer, born 1916) (1916–1986), English footballer, fullback for Lincoln City, Chesterfield and Rochdale William Watson (footballer, born 1900) (1900–?), Scottish footballer (Dumbarton FC) Willie Watson (footballer, born 1910), Scottish footballer (Hibernian, Ayr United) Jimmy Watson (footballer, born 1914) (1914–1979), aka Bill Watson (William James Boyd Watson), English footballer in the 1930s Billy Watson (soccer), Scottish-American footballer in the 1920s–30s Billy Watson (Scottish footballer) (died 1950), Bradford City A.F.C. footballer, 1921–1931 Willie Watson (English footballer), full-back for Northampton Town Willie Watson (English cricketer) (1920–2004), English cricketer and footballer Willie Watson (footballer, born 1949) (1949–2026), Scottish footballer (Manchester United, Motherwell) Graham Watson (footballer, born 1949), English footballer, aka "Willie" Watson

Cricket William Watson (cricketer, born 1881) (1881–1926), Australian cricketer Willie Watson (English cricketer) (1920–2004), English cricketer and footballer Bill Watson (cricketer) (1931–2018), Australian cricketer Willie Watson (New Zealand cricketer) (born 1965), New Zealand cricketer

Rugby Billy Watson (rugby union) (1869–1953), member of the 1893 New Zealand rugby union team Bill Watson (rugby union) (born 1949), Scotland international rugby union player Billy Watson (rugby league), footballer of the 1930s for England, and Keighley

Other sports William Watson (motoring pioneer) (1873–1961), British racing driver and motoring pioneer William Watson (weightlifter) (1918–1998), British Olympic weightlifter Whipper Billy Watson (1915–1990), Canadian wrestler William Watson (decathlete) (1916–1973), aka "Big Bill" Watson, American track and field athlete William Watson (basketball) ( 1920s), African-American basketball player Bill Watson (baseball), American baseball player Bill Watson (ice hockey) (born 1964), ice hockey player in Minnesota Willie Watson (bowls), Irish international lawn bowler William Poss Watson (1868–1950), Australian rules footballer Pop Watson (William Waverly Watson III, born 2004), American football player

Other people William Watson (bow maker) (1930–2018), British bow maker William Watson (chess player) (born 1962), English chess grandmaster William Watson (economist), Canadian economist, member of the research advisory board for Macdonald–Laurier Institute William Watson (merchant) (died 1559), English merchant and shipowner William Watson (priest) (1559–1603), English Roman Catholic priest and conspirator William Watson (sinologist) (1917–2007), professor of Chinese art and archaeology at London University William Watson, Baron Watson (1827–1899), Scottish judge William Watson, Baron Thankerton (1873–1948), Scottish judge William R. Watson (1887–1973), Canadian art dealer Sir William Renny Watson (1838–1900), British engineer and businessman

Other uses , a Liberty ship