John Cass (disambiguation)

John Cass (1661–1718) was a British merchant and politician.

Sir John Cass may also refer to:

• Sir John Cass's Foundation, an education charity in London
• Cass Business School, the former name of The Business School at City, University of London
• Sir John Cass (19th century), merchant and father of Annie Pearson, Viscountess Cowdray
• John Cass (1813–1889), master mariner and Captain of the Caduceus