William Cox

William Cox may refer to:

Military

 * William Ruffin Cox (1832–1919), Confederate general in the United States Civil War, later Secretary of the United States
 * William Cox (British general) (1776-1864), British general of the peninsular war, in Siege of Almeida (1810)
 * William Sitgreaves Cox (1790–1874), court-martialled acting third lieutenant of the USS Chesapeake