William, Willy, Bill, or Billy Wilkinson may refer to:
Law and politics William Wilkinson (diplomat) (died 1836), British Consul to Wallachia and Moldavia William Arthur Wilkinson (1795–1865), British MP for Lambeth William Wilkinson (New South Wales politician) (1858–1946), Australian politician and doctor
Sports Cricket William Wilkinson (cricketer, born 1857) (1857–1946), Australian-born physician and cricketer William Wilkinson (cricketer, born 1859) (1859–1940), English cricketer William Wilkinson (cricketer, born 1881) (1881–1961), English cricketer and footballer William Wilkinson (Australian cricketer) (1899–1974), Australian cricketer
Other sports William Wilkinson (footballer) (fl. 1890s), English football goalkeeper Bill Wilkinson (ice hockey) (born 1947), Canadian college ice hockey coach Bill Wilkinson (baseball) (born 1964), American baseball player Bill Wilkinson (athlete) (born 1934), English distance runner Billy Wilkinson (born 1951), Scottish footballer
Others William Wilkinson (architect) (1819–1901), British Gothic Revival architect William Cleaver Wilkinson (1833–1920), American Baptist minister and professor William Henry Wilkinson (trade unionist) (1850–1906), British trade union leader William Birkinshaw Wilkinson (1854–1927), Australian businessman, member of the Royal Geographical Society William Henry Wilkinson (1858–1930), British Sinologist William Alexander Wilkinson (1892–1983), Australian born British army officer William Wilkinson (priest) (born 1897), Welsh Anglican priest Bill Wilkinson (white supremacist) (born 1942), American social activist Willy Wilkinson, American public health consultant