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