The Grand Duke's Finances (German: Die Finanzen des Großherzogs) is a 1934 German comedy film directed by Gustaf Gründgens and starring Viktor de Kowa, Hilde Weissner and Heinz Rühmann.

The film was made at the Staaken Studios in Berlin while location shooting took place in Madeira and Tenerife.

His biggest financier and creditor, the shady crook Mircovich, is already devising a devious plan to overthrow the duke, because he wants to rule the country himself.

However, when the American Bekker discovers underground sulfur deposits, the situation changes because he offers the duke a large sum in order to be able to mine the sulphur.

The situation is saved when the Duke marries the rich Russian Grand Duchess Diana.