William Crooks (August 6, 1776 – December 31, 1836) was a businessman and political figure in Upper Canada.
He was born in Kilmarnock, Scotland in 1776.
In 1792, he travelled to Fort Niagara to join his brother James Crooks who was a merchant there; in 1795, the business was moved to Newark (Niagara-on-the-Lake).
With his brother, he was involved in milling and a distillery.
In 1800, he was named justice of the peace in the Niagara District and, in 1833, in the Gore District.
Crooks served as a captain in the local militia during the War of 1812.
In 1830, he was elected to the Legislative Assembly of Upper Canada for the 2nd and 3rd ridings of Lincoln.