Allied powers are nations that have joined in an alliance. More specifically, the term may refer to:

• Allies of World War I, member nations of the World War I alliance who fought against the Central Powers
• Allies of World War II, member nations of the World War II alliance who fought against the Axis Powers
• Allied Powers (Maritime Courts) Act 1941 (C.21) of the Parliament of the United Kingdom
• Allied Powers (horse), an Irish racehorse
• The Allied Powers (professional wrestling), a short-lived tag team