William Hoste Webb, QC (24 November 1820 – 19 December 1890) was a Quebec lawyer and political figure.
He studied at the Royal Naval School in London and came to Brompton Township in Lower Canada with his family in 1836.
Webb articled in law in Montreal and was called to the bar in 1850.
In 1857, Webb was elected to the Legislative Assembly of the Province of Canada for Richmond & Wolfe.
In 1875, he was named to the Legislative Council of Quebec for Wellington division and served until 1887, when he was appointed sheriff for Saint-François district.