William Cecil may refer to:

• Lord William Cecil (1854–1943), British royal courtier
• William Cecil, 1st Baron Burghley (1520–1598), English politician and advisor to Elizabeth I
• William Cecil, 2nd Earl of Exeter (1566–1640), Knight of the Garter
• William Cecil, 2nd Earl of Salisbury (1591–1668), Knight of the Garter
• William Cecil, 3rd Marquess of Exeter (1825–1895), member of the Privy Council of the United Kingdom
• William Cecil, 5th Marquess of Exeter (1876–1956), recipient of the Territorial Decoration
• William Cecil, 7th Marquess of Exeter (1909–1988), son of William Cecil, 5th Marquess of Exeter
• William Cecil, 17th Baron de Ros (1590–1618), Baron in the Peerage of England
• William Cecil Ross (1911–1998), politician in Manitoba, Canada
• William Cecil Slingsby (1849–1929), English mountain climber and alpine explorer

This disambiguation page lists articles associated with the same personal name. If an internal link led you here, you may wish to change the link to point directly to the intended article.