Siege of Cassel
Part of the Seven Years' War
Date March 1761 Location Cassel, Hesse-Kassel, Germany Result French victory
Belligerents
Great Britain  Hanover  Prussia Hesse-Kassel	France
Commanders and leaders
Duke Ferdinand of Brunswick	Duc de Broglie

The siege of Cassel (March 1761) was a failed attempt by Duke Ferdinand of Brunswick to capture French-held Kassel, the capital of Hesse-Kassel. Brunswick lifted the siege after forces of the Duc de Broglie inflicted heavy casualties on his forces at the Battle of Grünberg, making continuation of the siege untenable.