William Henry Wills, 1st Baron Winterstoke (1 September 1830 – 29 January 1911), known as Sir William Wills, Bt., between 1893 and 1906, was a British businessman, philanthropist and Liberal politician.
Wills was the son of William Day Wills and a cousin of Sir Frederick Wills, 1st Baronet, and Henry Overton Wills III, first chancellor of the University of Bristol.
A member of the wealthy Bristol tobacco importing Wills family, Wills joined the family firm at an early age. In 1858 he went into partnership with two of his cousins to form W. D. & H. O. Wills, which later became the Imperial Tobacco Company, of which he became the first chairman. Recognised as the head of the tobacco industry in Britain, he was also Chairman of the Bristol Chamber of Commerce. In 1904 he presented the Bristol City Museum and Art Gallery to the people of Bristol.
Wills was a member of the Bristol City Council from 1862 to 1880 and sheriff of the City from 1877 to 1878. He also sat as Liberal Member of Parliament (MP) for two separate five-year periods: for Coventry from 1880 to 1885, and for Bristol East from 1895 to 1900. He served as High Sheriff of Somerset in 1905.
He was made a Baronet, of Coombe Lodge in the Parish of Blagdon in the County of Somerset, in 1893 and raised to the peerage as Baron Winterstoke, of Blagdon in the County of Somerset, in 1906. He took his title from the ancient hundred of Winterstoke, in which his home at Blagdon lay.